diff --git a/src/test/testmessages.c b/src/test/testmessages.c
index 48fe4501..0161e9e7 100644
--- a/src/test/testmessages.c
+++ b/src/test/testmessages.c
@@ -27,6 +27,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <strings.h>
+#include <string.h>
 #include "testmessages.h"
 
 static char *testprog = NULL;