diff --git a/examples/rpl_udp/rpl.c b/examples/rpl_udp/rpl.c
index 0973238995..64b7a96c83 100644
--- a/examples/rpl_udp/rpl.c
+++ b/examples/rpl_udp/rpl.c
@@ -20,6 +20,8 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <inttypes.h>
+
 #include "vtimer.h"
 #include "thread.h"
 #include "net_if.h"