diff --git a/aomenc.c b/aomenc.c
index d3edb12..b167eb3 100644
--- a/aomenc.c
+++ b/aomenc.c
@@ -456,7 +456,7 @@
     ARG_DEF(NULL, "frame-parallel", 1,
             "Enable frame parallel decodability features "
             "(0: false (default), 1: true)");
-#if CONFIG_DELTA_Q && !CONFIG_EXT_DELTA_Q
+#if !CONFIG_EXT_DELTA_Q
 static const arg_def_t aq_mode = ARG_DEF(
     NULL, "aq-mode", 1,
     "Adaptive quantization mode (0: off (default), 1: variance 2: complexity, "
diff --git a/av1/common/blockd.h b/av1/common/blockd.h
index 8506e0a..9de3757 100644
--- a/av1/common/blockd.h
+++ b/av1/common/blockd.h
@@ -467,12 +467,10 @@
 #endif  // CONFIG_NEW_QUANT
   /* deringing gain *per-superblock* */
   int8_t cdef_strength;
-#if CONFIG_DELTA_Q
   int current_q_index;
 #if CONFIG_EXT_DELTA_Q
   int current_delta_lf_from_base;
 #endif
-#endif
 #if CONFIG_RD_DEBUG
   RD_STATS rd_stats;
   int mi_row;
@@ -824,7 +822,6 @@
 #if CONFIG_GLOBAL_MOTION
   WarpedMotionParams *global_motion;
 #endif  // CONFIG_GLOBAL_MOTION
-#if CONFIG_DELTA_Q
   int prev_qindex;
   int delta_qindex;
   int current_qindex;
@@ -838,7 +835,6 @@
   int prev_delta_lf_from_base;
   int current_delta_lf_from_base;
 #endif
-#endif
 #if CONFIG_ADAPT_SCAN
   const EobThresholdMD *eob_threshold_md;
 #endif
diff --git a/av1/common/entropy.c b/av1/common/entropy.c
index ac17d89..9219c3b 100644
--- a/av1/common/entropy.c
+++ b/av1/common/entropy.c
@@ -2278,12 +2278,10 @@
 
   AVERAGE_TILE_CDFS(partition_cdf)
 
-#if CONFIG_DELTA_Q
   AVERAGE_TILE_CDFS(delta_q_cdf)
 #if CONFIG_EXT_DELTA_Q
   AVERAGE_TILE_CDFS(delta_lf_cdf)
 #endif
-#endif
 #if CONFIG_EXT_INTRA && CONFIG_INTRA_INTERP
   AVERAGE_TILE_CDFS(intra_filter_cdf)
 #endif  // CONFIG_EXT_INTRA && CONFIG_INTRA_INTERP
diff --git a/av1/common/entropymode.c b/av1/common/entropymode.c
index 1c792ce..7a8b8d0 100644
--- a/av1/common/entropymode.c
+++ b/av1/common/entropymode.c
@@ -1615,7 +1615,6 @@
 #endif  // CONFIG_NEW_MULTISYMBOL
 #endif
 
-#if CONFIG_DELTA_Q
 static const aom_prob default_delta_q_probs[DELTA_Q_PROBS] = { 220, 220, 220 };
 static const aom_cdf_prob default_delta_q_cdf[CDF_SIZE(DELTA_Q_PROBS + 1)] = {
   AOM_ICDF(28160), AOM_ICDF(32120), AOM_ICDF(32677), AOM_ICDF(32768), 0
@@ -1627,7 +1626,6 @@
   AOM_ICDF(28160), AOM_ICDF(32120), AOM_ICDF(32677), AOM_ICDF(32768), 0
 };
 #endif
-#endif
 
 #if CONFIG_SMOOTH_HV
 const int av1_intra_mode_ind[INTRA_MODES] = { 0, 2, 3,  6,  4,  5, 8,
@@ -5052,14 +5050,12 @@
 #endif  // CONFIG_EXT_INTRA && CONFIG_INTRA_INTERP
   av1_copy(fc->seg.tree_cdf, default_seg_tree_cdf);
   av1_copy(fc->tx_size_cdf, default_tx_size_cdf);
-#if CONFIG_DELTA_Q
   av1_copy(fc->delta_q_prob, default_delta_q_probs);
   av1_copy(fc->delta_q_cdf, default_delta_q_cdf);
 #if CONFIG_EXT_DELTA_Q
   av1_copy(fc->delta_lf_prob, default_delta_lf_probs);
   av1_copy(fc->delta_lf_cdf, default_delta_lf_cdf);
 #endif
-#endif  // CONFIG_DELTA_Q
 #if CONFIG_CFL
   av1_copy(fc->cfl_sign_cdf, default_cfl_sign_cdf);
   av1_copy(fc->cfl_alpha_cdf, default_cfl_alpha_cdf);
@@ -5303,7 +5299,6 @@
         av1_mode_mv_merge_probs(pre_fc->partition_prob[i][PARTITION_HORZ], ct);
   }
 #endif
-#if CONFIG_DELTA_Q
   for (i = 0; i < DELTA_Q_PROBS; ++i)
     fc->delta_q_prob[i] =
         mode_mv_merge_probs(pre_fc->delta_q_prob[i], counts->delta_q[i]);
@@ -5312,7 +5307,6 @@
     fc->delta_lf_prob[i] =
         mode_mv_merge_probs(pre_fc->delta_lf_prob[i], counts->delta_lf[i]);
 #endif  // CONFIG_EXT_DELTA_Q
-#endif
 #if CONFIG_EXT_INTRA
 #if CONFIG_INTRA_INTERP
   for (i = 0; i < INTRA_FILTERS + 1; ++i) {
diff --git a/av1/common/entropymode.h b/av1/common/entropymode.h
index 38b795d..5118bd3 100644
--- a/av1/common/entropymode.h
+++ b/av1/common/entropymode.h
@@ -363,12 +363,10 @@
   aom_cdf_prob kf_y_cdf[INTRA_MODES][INTRA_MODES][CDF_SIZE(INTRA_MODES)];
   aom_cdf_prob tx_size_cdf[MAX_TX_DEPTH][TX_SIZE_CONTEXTS]
                           [CDF_SIZE(MAX_TX_DEPTH + 1)];
-#if CONFIG_DELTA_Q
   aom_cdf_prob delta_q_cdf[CDF_SIZE(DELTA_Q_PROBS + 1)];
 #if CONFIG_EXT_DELTA_Q
   aom_cdf_prob delta_lf_cdf[CDF_SIZE(DELTA_LF_PROBS + 1)];
 #endif
-#endif  // CONFIG_DELTA_Q
 #if CONFIG_EXT_TX
   aom_cdf_prob intra_ext_tx_cdf[EXT_TX_SETS_INTRA][EXT_TX_SIZES][INTRA_MODES]
                                [CDF_SIZE(TX_TYPES)];
@@ -381,12 +379,10 @@
 #if CONFIG_EXT_INTRA && CONFIG_INTRA_INTERP
   aom_cdf_prob intra_filter_cdf[INTRA_FILTERS + 1][CDF_SIZE(INTRA_FILTERS)];
 #endif  // CONFIG_EXT_INTRA && CONFIG_INTRA_INTERP
-#if CONFIG_DELTA_Q
   aom_prob delta_q_prob[DELTA_Q_PROBS];
 #if CONFIG_EXT_DELTA_Q
   aom_prob delta_lf_prob[DELTA_LF_PROBS];
 #endif
-#endif
 #if CONFIG_PVQ
   // TODO(any): If PVQ is enabled, most of coefficient related cdf,
   // such as coef_cdfs[], coef_tail_cdfs[], and coef_heaf_cdfs[] can be removed.
@@ -515,12 +511,10 @@
   unsigned int intrabc[2];
   nmv_context_counts dv;
 #endif
-#if CONFIG_DELTA_Q
   unsigned int delta_q[DELTA_Q_PROBS][2];
 #if CONFIG_EXT_DELTA_Q
   unsigned int delta_lf[DELTA_LF_PROBS][2];
 #endif
-#endif
 #if CONFIG_EXT_TX && CONFIG_RECT_TX
   unsigned int tx_size_implied[TX_SIZES][TX_SIZES];
 #endif  // CONFIG_EXT_TX && CONFIG_RECT_TX
diff --git a/av1/common/enums.h b/av1/common/enums.h
index 96e6c84..2f6ac83 100644
--- a/av1/common/enums.h
+++ b/av1/common/enums.h
@@ -626,7 +626,6 @@
 #define SKIP_NEARESTMV_SUB8X8_OFFSET 11
 
 #define INTER_MODE_CONTEXTS 7
-#if CONFIG_DELTA_Q
 #define DELTA_Q_SMALL 3
 #define DELTA_Q_PROBS (DELTA_Q_SMALL)
 #define DEFAULT_DELTA_Q_RES 4
@@ -635,7 +634,6 @@
 #define DELTA_LF_PROBS (DELTA_LF_SMALL)
 #define DEFAULT_DELTA_LF_RES 2
 #endif
-#endif
 
 /* Segment Feature Masks */
 #define MAX_MV_REF_CANDIDATES 2
diff --git a/av1/common/onyxc_int.h b/av1/common/onyxc_int.h
index e162269..b746002 100644
--- a/av1/common/onyxc_int.h
+++ b/av1/common/onyxc_int.h
@@ -496,7 +496,6 @@
   int cdef_bits;
 #endif
 
-#if CONFIG_DELTA_Q
   int delta_q_present_flag;
   // Resolution of delta quant
   int delta_q_res;
@@ -505,7 +504,6 @@
   // Resolution of delta lf level
   int delta_lf_res;
 #endif
-#endif
   int num_tg;
 #if CONFIG_REFERENCE_BUFFER
   int use_reference_buffer;
diff --git a/av1/decoder/decodeframe.c b/av1/decoder/decodeframe.c
index 100a9e0..2ba6037 100644
--- a/av1/decoder/decodeframe.c
+++ b/av1/decoder/decodeframe.c
@@ -1768,7 +1768,6 @@
       mi_row, mi_col, bsize, cfl->subsampling_x, cfl->subsampling_y);
 #endif  // CONFIG_CFL && CONFIG_CHROMA_SUB8X8
 
-#if CONFIG_DELTA_Q
   if (cm->delta_q_present_flag) {
     int i;
     for (i = 0; i < MAX_SEGMENTS; i++) {
@@ -1790,7 +1789,6 @@
       }
     }
   }
-#endif
 
 #if CONFIG_CB4X4
   if (mbmi->skip) av1_reset_skip_context(xd, mi_row, mi_col, bsize);
@@ -2445,7 +2443,6 @@
 
     set_segment_id_supertx(cm, mi_row, mi_col, bsize);
 
-#if CONFIG_DELTA_Q
     if (cm->delta_q_present_flag) {
       for (i = 0; i < MAX_SEGMENTS; i++) {
         int j;
@@ -2460,7 +2457,6 @@
         }
       }
     }
-#endif
 
     xd->mi = cm->mi_grid_visible + offset;
     xd->mi[0] = cm->mi + offset;
@@ -5014,7 +5010,6 @@
 
   setup_segmentation(cm, rb);
 
-#if CONFIG_DELTA_Q
   {
     struct segmentation *const seg = &cm->seg;
     int segment_quantizer_active = 0;
@@ -5047,10 +5042,10 @@
 #endif  // CONFIG_EXT_DELTA_Q
     }
   }
-#endif
 #if CONFIG_AMVR
   xd->cur_frame_mv_precision_level = cm->cur_frame_mv_precision_level;
 #endif
+
   for (i = 0; i < MAX_SEGMENTS; ++i) {
     const int qindex = cm->seg.enabled
                            ? av1_get_qindex(&cm->seg, i, cm->base_qindex)
diff --git a/av1/decoder/decodemv.c b/av1/decoder/decodemv.c
index a86cf0d..3d72612 100644
--- a/av1/decoder/decodemv.c
+++ b/av1/decoder/decodemv.c
@@ -40,7 +40,6 @@
       av1_intra_mode_inv[aom_read_symbol(r, cdf, INTRA_MODES, ACCT_STR)];
 }
 
-#if CONFIG_DELTA_Q
 static int read_delta_qindex(AV1_COMMON *cm, MACROBLOCKD *xd, aom_reader *r,
                              MB_MODE_INFO *const mbmi, int mi_col, int mi_row) {
   FRAME_COUNTS *counts = xd->counts;
@@ -118,7 +117,6 @@
   return reduced_delta_lflevel;
 }
 #endif
-#endif
 
 static PREDICTION_MODE read_intra_mode_y(FRAME_CONTEXT *ec_ctx, MACROBLOCKD *xd,
                                          aom_reader *r, int size_group) {
@@ -1100,7 +1098,6 @@
   mbmi->segment_id = read_intra_segment_id(cm, xd, mi_offset, x_mis, y_mis, r);
   mbmi->skip = read_skip(cm, xd, mbmi->segment_id, r);
 
-#if CONFIG_DELTA_Q
   if (cm->delta_q_present_flag) {
     xd->current_qindex =
         xd->prev_qindex +
@@ -1118,7 +1115,6 @@
     }
 #endif
   }
-#endif
 
   mbmi->ref_frame[0] = INTRA_FRAME;
   mbmi->ref_frame[1] = NONE_FRAME;
@@ -2933,7 +2929,6 @@
 #endif  // CONFIG_SUPERTX
     mbmi->skip = read_skip(cm, xd, mbmi->segment_id, r);
 
-#if CONFIG_DELTA_Q
   if (cm->delta_q_present_flag) {
     xd->current_qindex =
         xd->prev_qindex +
@@ -2951,7 +2946,6 @@
     }
 #endif
   }
-#endif
 
 #if CONFIG_SUPERTX
   if (!supertx_enabled) {
diff --git a/av1/encoder/av1_quantize.c b/av1/encoder/av1_quantize.c
index 6125093..033b4ba 100644
--- a/av1/encoder/av1_quantize.c
+++ b/av1/encoder/av1_quantize.c
@@ -1617,7 +1617,6 @@
   MACROBLOCKD *const xd = &x->e_mbd;
   const QUANTS *const quants = &cpi->quants;
 
-#if CONFIG_DELTA_Q
 #if CONFIG_EXT_DELTA_Q
   int current_q_index =
       AOMMAX(0, AOMMIN(QINDEX_RANGE - 1,
@@ -1631,9 +1630,6 @@
                                          : cm->base_qindex));
 #endif
   const int qindex = av1_get_qindex(&cm->seg, segment_id, current_q_index);
-#else
-  const int qindex = av1_get_qindex(&cm->seg, segment_id, cm->base_qindex);
-#endif
   const int rdmult = av1_compute_rd_mult(cpi, qindex + cm->y_dc_delta_q);
   int i;
 #if CONFIG_AOM_QM
diff --git a/av1/encoder/bitstream.c b/av1/encoder/bitstream.c
index c8fa96b..0b5e561 100644
--- a/av1/encoder/bitstream.c
+++ b/av1/encoder/bitstream.c
@@ -514,7 +514,6 @@
 #endif
 #endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
 
-#if CONFIG_DELTA_Q
 static void write_delta_qindex(const AV1_COMMON *cm, const MACROBLOCKD *xd,
                                int delta_qindex, aom_writer *w) {
   int sign = delta_qindex < 0;
@@ -562,7 +561,6 @@
   }
 }
 #endif  // CONFIG_EXT_DELTA_Q
-#endif  // CONFIG_DELTA_Q
 
 #if !CONFIG_NEW_MULTISYMBOL
 static void update_skip_probs(AV1_COMMON *cm, aom_writer *w,
@@ -1717,7 +1715,6 @@
 #else
   skip = write_skip(cm, xd, segment_id, mi, w);
 #endif  // CONFIG_SUPERTX
-#if CONFIG_DELTA_Q
   if (cm->delta_q_present_flag) {
     int super_block_upper_left =
         ((mi_row & MAX_MIB_MASK) == 0) && ((mi_col & MAX_MIB_MASK) == 0);
@@ -1738,7 +1735,6 @@
 #endif  // CONFIG_EXT_DELTA_Q
     }
   }
-#endif
 
 #if CONFIG_SUPERTX
   if (!supertx_enabled)
@@ -2112,12 +2108,7 @@
 #endif  // !CONFIG_TXK_SEL
 }
 
-static void write_mb_modes_kf(AV1_COMMON *cm,
-#if CONFIG_DELTA_Q
-                              MACROBLOCKD *xd,
-#else
-                              const MACROBLOCKD *xd,
-#endif  // CONFIG_DELTA_Q
+static void write_mb_modes_kf(AV1_COMMON *cm, MACROBLOCKD *xd,
 #if CONFIG_INTRABC
                               const MB_MODE_INFO_EXT *mbmi_ext,
 #endif  // CONFIG_INTRABC
@@ -2141,7 +2132,6 @@
 
   if (seg->update_map) write_segment_id(w, seg, segp, mbmi->segment_id);
 
-#if CONFIG_DELTA_Q
   const int skip = write_skip(cm, xd, mbmi->segment_id, mi, w);
   if (cm->delta_q_present_flag) {
     int super_block_upper_left =
@@ -2163,9 +2153,6 @@
 #endif  // CONFIG_EXT_DELTA_Q
     }
   }
-#else
-  write_skip(cm, xd, mbmi->segment_id, mi, w);
-#endif
 
   int enable_tx_size = cm->tx_mode == TX_MODE_SELECT &&
 #if CONFIG_CB4X4 && (CONFIG_VAR_TX || CONFIG_RECT_TX)
@@ -3233,7 +3220,6 @@
 #if CONFIG_PVQ
   assert(cpi->td.mb.pvq_q->curr_pos == 0);
 #endif
-#if CONFIG_DELTA_Q
   if (cpi->common.delta_q_present_flag) {
     xd->prev_qindex = cpi->common.base_qindex;
 #if CONFIG_EXT_DELTA_Q
@@ -3242,7 +3228,6 @@
     }
 #endif  // CONFIG_EXT_DELTA_Q
   }
-#endif
 
   for (mi_row = mi_row_start; mi_row < mi_row_end; mi_row += cm->mib_size) {
     av1_zero_left_context(xd);
@@ -4727,7 +4712,6 @@
   encode_loopfilter(cm, wb);
   encode_quantization(cm, wb);
   encode_segmentation(cm, xd, wb);
-#if CONFIG_DELTA_Q
   {
     int i;
     struct segmentation *const seg = &cm->seg;
@@ -4756,7 +4740,6 @@
       }
     }
   }
-#endif
 #if CONFIG_CDEF
   if (!cm->all_lossless) {
     encode_cdef(cm, wb);
@@ -5086,7 +5069,6 @@
   encode_loopfilter(cm, wb);
   encode_quantization(cm, wb);
   encode_segmentation(cm, xd, wb);
-#if CONFIG_DELTA_Q
   {
     int i;
     struct segmentation *const seg = &cm->seg;
@@ -5115,7 +5097,6 @@
       }
     }
   }
-#endif
 #if CONFIG_CDEF
   if (!cm->all_lossless) {
     encode_cdef(cm, wb);
diff --git a/av1/encoder/encodeframe.c b/av1/encoder/encodeframe.c
index 15c4a86..c4afad5 100644
--- a/av1/encoder/encodeframe.c
+++ b/av1/encoder/encodeframe.c
@@ -662,7 +662,7 @@
         xd->mi[x_idx + y * mis] = mi_addr;
       }
 
-#if CONFIG_DELTA_Q && !CONFIG_EXT_DELTA_Q
+#if !CONFIG_EXT_DELTA_Q
   if (cpi->oxcf.aq_mode > NO_AQ && cpi->oxcf.aq_mode < DELTA_AQ)
     av1_init_plane_quantizers(cpi, x, xd->mi[0]->mbmi.segment_id);
 #else
@@ -1608,7 +1608,6 @@
   const BLOCK_SIZE bsize = mbmi->sb_type;
   FRAME_CONTEXT *fc = xd->tile_ctx;
 
-#if CONFIG_DELTA_Q
   // delta quant applies to both intra and inter
   int super_block_upper_left =
       ((mi_row & MAX_MIB_MASK) == 0) && ((mi_col & MAX_MIB_MASK) == 0);
@@ -1637,10 +1636,6 @@
     }
 #endif
   }
-#else
-  (void)mi_row;
-  (void)mi_col;
-#endif
   if (!frame_is_intra_only(cm)) {
     FRAME_COUNTS *const counts = td->counts;
     RD_COUNTS *rdc = &td->rd_counts;
@@ -4525,7 +4520,6 @@
   // Initialize the left context for the new SB row
   av1_zero_left_context(xd);
 
-#if CONFIG_DELTA_Q
   // Reset delta for every tile
   if (cm->delta_q_present_flag)
     if (mi_row == tile_info->mi_row_start) xd->prev_qindex = cm->base_qindex;
@@ -4533,7 +4527,6 @@
   if (cm->delta_lf_present_flag)
     if (mi_row == tile_info->mi_row_start) xd->prev_delta_lf_from_base = 0;
 #endif
-#endif
 
   // Code each SB in the row
   for (mi_col = tile_info->mi_col_start; mi_col < tile_info->mi_col_end;
@@ -4589,7 +4582,7 @@
 #if CONFIG_AMVR
     xd->cur_frame_mv_precision_level = cm->cur_frame_mv_precision_level;
 #endif
-#if CONFIG_DELTA_Q
+
     if (cm->delta_q_present_flag) {
       // Test mode for delta quantization
       int sb_row = mi_row >> 3;
@@ -4634,7 +4627,6 @@
       }
 #endif  // CONFIG_EXT_DELTA_Q
     }
-#endif  // CONFIG_DELTA_Q
 
     x->source_variance = UINT_MAX;
     if (sf->partition_search_type == FIXED_PARTITION || seg_skip) {
@@ -5368,7 +5360,6 @@
 
   cm->tx_mode = select_tx_mode(cpi);
 
-#if CONFIG_DELTA_Q
   // Fix delta q resolution for the moment
   cm->delta_q_res = DEFAULT_DELTA_Q_RES;
 // Set delta_q_present_flag before it is used for the first time
@@ -5381,7 +5372,6 @@
   cm->delta_q_present_flag =
       cpi->oxcf.aq_mode == DELTA_AQ && cm->base_qindex > 0;
 #endif  // CONFIG_EXT_DELTA_Q
-#endif
 
   av1_frame_init_quantizer(cpi);
 
diff --git a/av1/encoder/encoder.h b/av1/encoder/encoder.h
index 9a057828..8416e25 100644
--- a/av1/encoder/encoder.h
+++ b/av1/encoder/encoder.h
@@ -119,7 +119,7 @@
   VARIANCE_AQ = 1,
   COMPLEXITY_AQ = 2,
   CYCLIC_REFRESH_AQ = 3,
-#if CONFIG_DELTA_Q && !CONFIG_EXT_DELTA_Q
+#if !CONFIG_EXT_DELTA_Q
   DELTA_AQ = 4,
 #endif
   AQ_MODE_COUNT  // This should always be the last member of the enum
diff --git a/build/cmake/aom_config_defaults.cmake b/build/cmake/aom_config_defaults.cmake
index 94304da..0333798 100644
--- a/build/cmake/aom_config_defaults.cmake
+++ b/build/cmake/aom_config_defaults.cmake
@@ -130,7 +130,6 @@
 set(CONFIG_DAALA_TX 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_DCT_ONLY 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_DEBLOCK_13TAP 0 CACHE NUMBER "AV1 experiment flag.")
-set(CONFIG_DELTA_Q 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_DEPENDENT_HORZTILES 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_DIST_8X8 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_DPCM_INTRA 0 CACHE NUMBER "AV1 experiment flag.")
diff --git a/configure b/configure
index a452264..4351a55 100755
--- a/configure
+++ b/configure
@@ -303,7 +303,6 @@
     chroma_2x2
     chroma_sub8x8
     frame_size
-    delta_q
     ext_delta_q
     adapt_scan
     filter_7bit
@@ -508,7 +507,6 @@
     soft_enable chroma_sub8x8
     soft_enable filter_7bit
     soft_enable reference_buffer
-    soft_enable delta_q
     soft_enable rect_tx
     soft_enable global_motion
     soft_enable ext_tx
@@ -554,7 +552,6 @@
     enabled pvq && disable_feature palette_throughput
     enabled mrc_tx && enable_feature ext_tx
     enabled mrc_tx && enable_feature var_tx
-    enabled ext_delta_q && soft_enable delta_q
     enabled txk_sel && soft_enable lv_map
     enabled ctx1d && soft_enable lv_map
     enabled ctx1d && soft_enable ext_tx
@@ -573,10 +570,6 @@
     enabled cdef_singlepass && enable_feature cdef
     enabled new_multisymbol && enable_feature restrict_compressed_hdr
 
-    if ! enabled delta_q && enabled ext_delta_q; then
-      log_echo "ext_delta_q requires delta_q, so disabling ext_delta_q"
-      disable_feature ext_delta_q
-    fi
     if enabled rawbits && enabled ans; then
       log_echo "rawbits requires not ans, so disabling rawbits"
       disable_feature rawbits
diff --git a/test/aq_segment_test.cc b/test/aq_segment_test.cc
index 026b002..57db0d0 100644
--- a/test/aq_segment_test.cc
+++ b/test/aq_segment_test.cc
@@ -90,7 +90,7 @@
 
 TEST_P(AqSegmentTestLarge, TestNoMisMatchAQ3) { DoTest(3); }
 
-#if CONFIG_DELTA_Q & !CONFIG_EXT_DELTA_Q
+#if !CONFIG_EXT_DELTA_Q
 // Validate that this AQ mode (AQ=4, delta q)
 // encodes and decodes without a mismatch.
 TEST_P(AqSegmentTest, TestNoMisMatchAQ4) {
diff --git a/tools/aom_entropy_optimizer.c b/tools/aom_entropy_optimizer.c
index 5e138ce..04c9cda 100644
--- a/tools/aom_entropy_optimizer.c
+++ b/tools/aom_entropy_optimizer.c
@@ -732,8 +732,7 @@
       "static const aom_cdf_prob default_intrabc_cdf[CDF_SIZE(2)]");
 #endif
 
-/* delta_q experiment */
-#if CONFIG_DELTA_Q
+  /* delta_q */
   cts_each_dim[0] = DELTA_Q_PROBS;
   cts_each_dim[1] = 2;
   optimize_entropy_table(
@@ -746,7 +745,6 @@
       &fc.delta_lf[0][0], probsfile, 2, cts_each_dim, NULL, 1,
       "static const aom_prob default_delta_lf_probs[DELTA_LF_PROBS]");
 #endif
-#endif
 
 /* Transform type */
 #if CONFIG_EXT_TX