diff --git a/util/cbfstool/cbfstool.c b/util/cbfstool/cbfstool.c
index 3c6db6f231..183a614491 100644
--- a/util/cbfstool/cbfstool.c
+++ b/util/cbfstool/cbfstool.c
@@ -20,6 +20,7 @@
 
 #include <stdio.h>
 #include <stdint.h>
+#include <string.h>
 #include "common.h"
 #include "cbfs.h"