Add include of string.h

diff --git a/test/test_wrbuf.c b/test/test_wrbuf.c
index defdc34..7c27fe5 100644 (file)
--- a/test/test_wrbuf.c
+++ b/test/test_wrbuf.c
@@ -8,6 +8,7 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 
 #include <yaz/wrbuf.h>
 #include <yaz/test.h>