diff --git a/libavutil/internal.h b/libavutil/internal.h
index 63d14a55e3..6138892785 100644
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -36,6 +36,7 @@
 #include <assert.h>
 #include "config.h"
 #include "common.h"
+#include "mem.h"
 #include "timer.h"
 
 #ifndef attribute_align_arg