diff --git a/lib/hx509/cert.c b/lib/hx509/cert.c
index 14807f817..9d71d1b26 100644
--- a/lib/hx509/cert.c
+++ b/lib/hx509/cert.c
@@ -1570,6 +1570,19 @@ hx509_verify_signature(hx509_context context,
     return _hx509_verify_signature(signer->data, alg, data, sig);
 }
 
+int
+hx509_verify_hostname(hx509_context context,
+		      const hx509_cert cert,
+		      int require_match,
+		      const char *hostname,
+		      const struct sockaddr *sa,
+		      /* XXX krb5_socklen_t */ int sa_size) 
+{
+    if (sa && sa_size <= 0)
+	return EINVAL;
+    return 0;
+}
+
 int
 _hx509_set_cert_attribute(hx509_cert cert, const heim_oid *oid, 
 			  const heim_octet_string *attr)