diff --git a/libmpdemux/realrtsp/rtsp_session.c b/libmpdemux/realrtsp/rtsp_session.c
index 9a4d547d62..5a5a46eda9 100644
--- a/libmpdemux/realrtsp/rtsp_session.c
+++ b/libmpdemux/realrtsp/rtsp_session.c
@@ -39,6 +39,7 @@
 #include <fcntl.h>
 #include <stdlib.h>
 #include <string.h>
+#include <inttypes.h>
 
 #include "rtsp.h"
 #include "rtsp_session.h"