diff -r f6ea5b3739c9 -r 6ef79af0c445 util-src/hashes.c
--- a/util-src/hashes.c	Tue Aug 06 14:32:31 2013 +0200
+++ b/util-src/hashes.c	Fri Aug 09 16:03:17 2013 +0200
@@ -79,7 +79,7 @@
 	};
 
 	int i;
-	char hashedKey[64]; /* Maximum used digest length */
+	unsigned char hashedKey[64]; /* Maximum used digest length */
 	union xory k_ipad, k_opad;
 
 	if (key_len > 64) {