diff --git a/libvo/vo_directx.c b/libvo/vo_directx.c
index c9dfdde995..419c0f2b94 100644
--- a/libvo/vo_directx.c
+++ b/libvo/vo_directx.c
@@ -26,6 +26,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
+#include <libavutil/common.h>
 #include "config.h"
 #include "video_out.h"
 #include "video_out_internal.h"