diff --git a/vp9/encoder/vp9_ratectrl.c b/vp9/encoder/vp9_ratectrl.c
index 0ec93a9..b8a5e6e 100644
--- a/vp9/encoder/vp9_ratectrl.c
+++ b/vp9/encoder/vp9_ratectrl.c
@@ -337,7 +337,7 @@
   rc->total_actual_bits = 0;
   rc->total_target_bits = 0;
   rc->total_target_vs_actual = 0;
-  rc->avg_intersize_gfint = 0;
+  rc->avg_size_inter = 0;
   rc->avg_frame_low_motion = 0;
   rc->high_source_sad = 0;
   rc->count_last_scene_change = 0;
@@ -1471,7 +1471,8 @@
     if (cm->frame_type != KEY_FRAME)
       compute_frame_low_motion(cpi);
     if (!cpi->refresh_golden_frame && !cpi->refresh_alt_ref_frame)
-      rc->avg_intersize_gfint += rc->projected_frame_size;
+      rc->avg_size_inter = ROUND_POWER_OF_TWO(
+          rc->avg_size_inter * 3 + rc->projected_frame_size, 2);
   }
 }
 
@@ -1547,8 +1548,6 @@
     cm->frame_type = INTER_FRAME;
   }
   if (rc->frames_till_gf_update_due == 0) {
-    rc->avg_intersize_gfint =
-        rc->avg_intersize_gfint / (rc->baseline_gf_interval + 1);
     rc->gfu_boost = DEFAULT_GF_BOOST;
     if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ && cpi->oxcf.pass == 0) {
       vp9_cyclic_refresh_set_golden_update(cpi);
@@ -1559,7 +1558,7 @@
     // Increase gf interval at high Q and high overshoot.
     if (cm->current_video_frame > 30 &&
         rc->avg_frame_qindex[INTER_FRAME] > (7 * rc->worst_quality) >> 3 &&
-        rc->avg_intersize_gfint > (5 * rc->avg_frame_bandwidth) >> 1) {
+        rc->avg_size_inter > (5 * rc->avg_frame_bandwidth) >> 1) {
         rc->baseline_gf_interval = (3 * rc->baseline_gf_interval) >> 1;
     } else if (cm->current_video_frame > 30 &&
                rc->avg_frame_low_motion < 20) {
@@ -1571,7 +1570,6 @@
     rc->frames_till_gf_update_due = rc->baseline_gf_interval;
     cpi->refresh_golden_frame = 1;
     rc->source_alt_ref_pending = USE_ALTREF_FOR_ONE_PASS;
-    rc->avg_intersize_gfint = 0;
   }
   if (cm->frame_type == KEY_FRAME)
     target = calc_iframe_target_size_one_pass_vbr(cpi);
@@ -2160,7 +2158,6 @@
       target = calc_pframe_target_size_one_pass_vbr(cpi);
       vp9_rc_set_frame_target(cpi, target);
       rc->count_last_scene_change = 0;
-      rc->avg_intersize_gfint = 0;
     } else {
       rc->count_last_scene_change++;
     }
diff --git a/vp9/encoder/vp9_ratectrl.h b/vp9/encoder/vp9_ratectrl.h
index eef1940..893905e 100644
--- a/vp9/encoder/vp9_ratectrl.h
+++ b/vp9/encoder/vp9_ratectrl.h
@@ -162,7 +162,7 @@
   uint64_t avg_source_sad;
   int high_source_sad;
   int count_last_scene_change;
-  int avg_intersize_gfint;
+  int avg_size_inter;
   int avg_frame_low_motion;
 } RATE_CONTROL;