1 files changed, 3 insertions, 2 deletions

diff --git a/src/lib/libcrypto/bn/bn_convert.c b/src/lib/libcrypto/bn/bn_convert.c
index 9ad9f58f93..4736099cdc 100644
--- a/src/lib/libcrypto/bn/bn_convert.c
+++ b/src/lib/libcrypto/bn/bn_convert.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: bn_convert.c,v 1.11 2023/06/23 10:33:12 tb Exp $ */
+/* $OpenBSD: bn_convert.c,v 1.12 2023/06/23 10:48:40 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -301,7 +301,8 @@ BN_asc2bn(BIGNUM **bnp, const char *s)
                 return 0;
 
  done:
-        BN_set_negative(*bnp, neg);
+        if (bnp != NULL && *bnp != NULL)
+                BN_set_negative(*bnp, neg);
 
         return 1;
 }