diff --git a/crypto/x509/v3_ncons.c b/crypto/x509/v3_ncons.c
index 481e1e2044..c6ebb2f6e1 100644
--- a/crypto/x509/v3_ncons.c
+++ b/crypto/x509/v3_ncons.c
@@ -34,8 +34,8 @@ static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
 static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip);
 
 static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc);
-static int nc_match_single(int effective_type, GENERAL_NAME *sub,
-                           GENERAL_NAME *gen);
+static int nc_match_single(int effective_type, GENERAL_NAME *gen,
+                           GENERAL_NAME *base);
 static int nc_dn(const X509_NAME *sub, const X509_NAME *nm);
 static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns);
 static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml);