1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/libcrypto/asn1/a_strnid.c b/src/lib/libcrypto/asn1/a_strnid.c
index 753021a7a2..2fc48c1551 100644
--- a/src/lib/libcrypto/asn1/a_strnid.c
+++ b/src/lib/libcrypto/asn1/a_strnid.c
@@ -95,7 +95,7 @@ unsigned long ASN1_STRING_get_default_mask(void)
  * default:   the default value, Printable, T61, BMP.
  */
 
-int ASN1_STRING_set_default_mask_asc(char *p)
+int ASN1_STRING_set_default_mask_asc(const char *p)
 {
         unsigned long mask;
         char *end;