diff --git a/hmac.c b/hmac.c
index d1c12417e..1c879640c 100644
--- a/hmac.c
+++ b/hmac.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: hmac.c,v 1.11 2015/01/15 21:37:14 markus Exp $ */
+/* $OpenBSD: hmac.c,v 1.12 2015/03/24 20:03:44 markus Exp $ */
 /*
  * Copyright (c) 2014 Markus Friedl.  All rights reserved.
  *
@@ -154,7 +154,7 @@ hmac_test(void *key, size_t klen, void *m, size_t mlen, u_char *e, size_t elen)
 
 	if (memcmp(e, digest, elen)) {
 		for (i = 0; i < elen; i++)
-			printf("[%zd] %2.2x %2.2x\n", i, e[i], digest[i]);
+			printf("[%zu] %2.2x %2.2x\n", i, e[i], digest[i]);
 		printf("mismatch\n");
 	} else
 		printf("ok\n");
diff --git a/sshbuf-misc.c b/sshbuf-misc.c
index f1c2d03c9..d022065f9 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 @@ sshbuf_dump_data(const void *s, size_t len, FILE *f)
 	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]);