1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/libcrypto/asn1/f_string.c b/src/lib/libcrypto/asn1/f_string.c
index 138044e063..af17f43e1d 100644
--- a/src/lib/libcrypto/asn1/f_string.c
+++ b/src/lib/libcrypto/asn1/f_string.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: f_string.c,v 1.17 2017/01/29 17:49:22 beck Exp $ */
+/* $OpenBSD: f_string.c,v 1.18 2018/04/25 11:48:21 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -63,7 +63,7 @@
 #include <openssl/err.h>
 
 int
-i2a_ASN1_STRING(BIO *bp, ASN1_STRING *a, int type)
+i2a_ASN1_STRING(BIO *bp, const ASN1_STRING *a, int type)
 {
         int i, n = 0;
         static const char h[] = "0123456789ABCDEF";