diff --git a/tests/vtimer_msg/main.c b/tests/vtimer_msg/main.c
index bfdfefca4..5af132477 100644
--- a/tests/vtimer_msg/main.c
+++ b/tests/vtimer_msg/main.c
@@ -21,6 +21,7 @@
 
 #include <stdio.h>
 #include <time.h>
+#include <inttypes.h>
 
 #include "vtimer.h"
 #include "thread.h"