diff --git a/build/cmake/aom_config_defaults.cmake b/build/cmake/aom_config_defaults.cmake
index 95437c35f639fe22be8cbcdbe83c4259c7d24e89..7b9b0bc27058d40fada40da283b691c3edaeaea6 100644
--- a/build/cmake/aom_config_defaults.cmake
+++ b/build/cmake/aom_config_defaults.cmake
@@ -175,7 +175,7 @@ set(CONFIG_SEGMENT_GLOBALMV 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_SEGMENT_PRED_LAST 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_SHORT_FILTER 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_SIMPLIFY_TX_MODE 1 CACHE NUMBER "AV1 experiment flag.")
-set(CONFIG_SPATIAL_SEGMENTATION 0 CACHE NUMBER "AV1 experiment flag.")
+set(CONFIG_SPATIAL_SEGMENTATION 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_STRIPED_LOOP_RESTORATION 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_TEMPMV_SIGNALING 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_TILE_INFO_FIRST 0 CACHE NUMBER "AV1 experiment flag.")