diff --git a/libavcodec/mathops.h b/libavcodec/mathops.h
index 958132d897..2d56d007aa 100644
--- a/libavcodec/mathops.h
+++ b/libavcodec/mathops.h
@@ -25,6 +25,7 @@
 #include <stdint.h>
 
 #include "libavutil/common.h"
+#include "libavutil/internal.h"
 #include "config.h"
 
 #define MAX_NEG_CROP 1024