diff --git a/libraries/libldap/tls_o.c b/libraries/libldap/tls_o.c
index 6f27168..eb7b97c 100644
--- a/libraries/libldap/tls_o.c
+++ b/libraries/libldap/tls_o.c
@@ -862,7 +862,12 @@ tlso_session_endpoint( tls_session *sess, struct berval *buf, int is_server )
 		return 0;
 
 #if OPENSSL_VERSION_NUMBER >= 0x10100000
-	md = EVP_get_digestbynid( X509_get_signature_nid( cert ));
+	{
+		int mdnid;
+		if ( !OBJ_find_sigid_algs( X509_get_signature_nid( cert ), &mdnid, NULL ))
+			return 0;
+		md = EVP_get_digestbynid( mdnid );
+	}
 #else
 	md = EVP_get_digestbynid(OBJ_obj2nid( cert->sig_alg->algorithm ));
 #endif