1 files changed, 4 insertions, 1 deletions

diff --git a/src/lib/libtls/tls_config.c b/src/lib/libtls/tls_config.c
index 581c493a55..777dfc52f0 100644
--- a/src/lib/libtls/tls_config.c
+++ b/src/lib/libtls/tls_config.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tls_config.c,v 1.43 2017/08/10 18:18:30 jsing Exp $ */
+/* $OpenBSD: tls_config.c,v 1.44 2017/09/25 18:07:03 jsing Exp $ */
 /*
  * Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
  *
@@ -311,6 +311,9 @@ tls_config_parse_protocols(uint32_t *protocols, const char *protostr)
         char *s, *p, *q;
         int negate;
 
+        if (protostr == NULL)
+                return TLS_PROTOCOLS_DEFAULT;
+
         if ((s = strdup(protostr)) == NULL)
                 return (-1);