diff --git a/libavutil/mem.c b/libavutil/mem.c
index 1b960f2911..45cd986ee1 100644
--- a/libavutil/mem.c
+++ b/libavutil/mem.c
@@ -25,12 +25,6 @@
  */
 
 #include "config.h"
-#include "common.h"
-
-/* here we can use OS dependent allocation functions */
-#undef malloc
-#undef free
-#undef realloc
 
 #include <limits.h>
 #include <stdlib.h>