diff --git a/sshbuf-misc.c b/sshbuf-misc.c
index f1c2d03..d022065 100644
--- a/sshbuf-misc.c
+++ b/sshbuf-misc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sshbuf-misc.c,v 1.3 2015/02/05 12:59:57 millert Exp $	*/
+/*	$OpenBSD: sshbuf-misc.c,v 1.4 2015/03/24 20:03:44 markus Exp $	*/
 /*
  * Copyright (c) 2011 Damien Miller
  *
@@ -42,7 +42,7 @@
 	const u_char *p = (const u_char *)s;
 
 	for (i = 0; i < len; i += 16) {
-		fprintf(f, "%.4zd: ", i);
+		fprintf(f, "%.4zu: ", i);
 		for (j = i; j < i + 16; j++) {
 			if (j < len)
 				fprintf(f, "%02x ", p[j]);