diff --git a/av1/encoder/encoder.c b/av1/encoder/encoder.c
index d77d50b..51feb0c 100644
--- a/av1/encoder/encoder.c
+++ b/av1/encoder/encoder.c
@@ -760,12 +760,17 @@
         aom_memalign(32, MAX_SB_SIZE * MAX_SB_SIZE * sizeof(*x->tmp_conv_dst)));
     x->e_mbd.tmp_conv_dst = x->tmp_conv_dst;
   }
-  for (int i = 0; i < 2; ++i) {
-    if (x->tmp_pred_bufs[i] == NULL) {
-      CHECK_MEM_ERROR(cm, x->tmp_pred_bufs[i],
-                      aom_memalign(32, 2 * MAX_MB_PLANE * MAX_SB_SQUARE *
-                                           sizeof(*x->tmp_pred_bufs[i])));
-      x->e_mbd.tmp_obmc_bufs[i] = x->tmp_pred_bufs[i];
+  // The buffers 'tmp_pred_bufs[]' are used in inter frames to store temporary
+  // prediction results. Hence, the memory allocation is avoided for allintra
+  // encode.
+  if (cpi->oxcf.kf_cfg.key_freq_max != 0) {
+    for (int i = 0; i < 2; ++i) {
+      if (x->tmp_pred_bufs[i] == NULL) {
+        CHECK_MEM_ERROR(cm, x->tmp_pred_bufs[i],
+                        aom_memalign(32, 2 * MAX_MB_PLANE * MAX_SB_SQUARE *
+                                             sizeof(*x->tmp_pred_bufs[i])));
+        x->e_mbd.tmp_obmc_bufs[i] = x->tmp_pred_bufs[i];
+      }
     }
   }
 
diff --git a/av1/encoder/ethread.c b/av1/encoder/ethread.c
index c7a07d2..b6e2c2b 100644
--- a/av1/encoder/ethread.c
+++ b/av1/encoder/ethread.c
@@ -742,11 +742,17 @@
         alloc_compound_type_rd_buffers(&ppi->error,
                                        &thread_data->td->comp_rd_buffer);
 
-        for (int j = 0; j < 2; ++j) {
-          AOM_CHECK_MEM_ERROR(
-              &ppi->error, thread_data->td->tmp_pred_bufs[j],
-              aom_memalign(32, 2 * MAX_MB_PLANE * MAX_SB_SQUARE *
-                                   sizeof(*thread_data->td->tmp_pred_bufs[j])));
+        // The buffers 'tmp_pred_bufs[]' are used in inter frames to store
+        // temporary prediction results. Hence, the memory allocation is avoided
+        // for allintra encode.
+        if (ppi->cpi->oxcf.kf_cfg.key_freq_max != 0) {
+          for (int j = 0; j < 2; ++j) {
+            AOM_CHECK_MEM_ERROR(
+                &ppi->error, thread_data->td->tmp_pred_bufs[j],
+                aom_memalign(32,
+                             2 * MAX_MB_PLANE * MAX_SB_SQUARE *
+                                 sizeof(*thread_data->td->tmp_pred_bufs[j])));
+          }
         }
 
         const SPEED_FEATURES *sf = &ppi->cpi->sf;