diff --git a/examples/rest-example/coap-client-example.c b/examples/rest-example/coap-client-example.c
index b88b0ca2a..c9e6e3776 100644
--- a/examples/rest-example/coap-client-example.c
+++ b/examples/rest-example/coap-client-example.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include "contiki.h"
 #include "contiki-net.h"
 #include "rest.h"