diff --git a/vp9/common/vp9_rtcd_defs.sh b/vp9/common/vp9_rtcd_defs.sh
index f281e08e9..74d3ab57f 100644
--- a/vp9/common/vp9_rtcd_defs.sh
+++ b/vp9/common/vp9_rtcd_defs.sh
@@ -93,7 +93,7 @@ prototype void vp9_mbloop_filter_vertical_edge "uint8_t *s, int pitch, const uin
 specialize vp9_mbloop_filter_vertical_edge
 
 prototype void vp9_loop_filter_vertical_edge "uint8_t *s, int pitch, const uint8_t *blimit, const uint8_t *limit, const uint8_t *thresh, int count"
-specialize vp9_loop_filter_vertical_edge
+specialize vp9_loop_filter_vertical_edge mmx
 
 prototype void vp9_mb_lpf_horizontal_edge_w "uint8_t *s, int pitch, const uint8_t *blimit, const uint8_t *limit, const uint8_t *thresh, int count"
 specialize vp9_mb_lpf_horizontal_edge_w
@@ -102,7 +102,7 @@ prototype void vp9_mbloop_filter_horizontal_edge "uint8_t *s, int pitch, const u
 specialize vp9_mbloop_filter_horizontal_edge
 
 prototype void vp9_loop_filter_horizontal_edge "uint8_t *s, int pitch, const uint8_t *blimit, const uint8_t *limit, const uint8_t *thresh, int count"
-specialize vp9_loop_filter_horizontal_edge
+specialize vp9_loop_filter_horizontal_edge mmx
 
 #
 # post proc