diff --git a/libavfilter/vf_yadif.c b/libavfilter/vf_yadif.c
index 8cd6f0dc37..5789da6c89 100644
--- a/libavfilter/vf_yadif.c
+++ b/libavfilter/vf_yadif.c
@@ -28,9 +28,6 @@
 #include "video.h"
 #include "yadif.h"
 
-#undef NDEBUG
-#include <assert.h>
-
 typedef struct ThreadData {
     AVFrame *frame;
     int plane;