diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index f98d850272..a0b5738790 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -28,8 +28,6 @@
 # include "libavutil/bprint.h"
 #endif
 
-#undef NDEBUG
-#include <assert.h>
 #include "libavutil/avassert.h"
 
 /*********************************************/