diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c
index cf9b77dd92..ea13ee0650 100644
--- a/libavformat/mxfenc.c
+++ b/libavformat/mxfenc.c
@@ -32,6 +32,7 @@
 
 //#define DEBUG
 
+#include <inttypes.h>
 #include <math.h>
 #include <time.h>