diff --git a/libavcodec/libxvidff.c b/libavcodec/libxvidff.c
index 1e887a2a8c..fd0aea58fa 100644
--- a/libavcodec/libxvidff.c
+++ b/libavcodec/libxvidff.c
@@ -30,6 +30,7 @@
 #include "avcodec.h"
 #include "libavutil/cpu.h"
 #include "libavutil/intreadwrite.h"
+#include "libavutil/mathematics.h"
 #include "libxvid_internal.h"
 #if !HAVE_MKSTEMP
 #include <fcntl.h>