diff --git a/authlib/integrations/base_client/sync_app.py b/authlib/integrations/base_client/sync_app.py
index 38f5df84..3716c0dd 100644
--- a/authlib/integrations/base_client/sync_app.py
+++ b/authlib/integrations/base_client/sync_app.py
@@ -254,7 +254,7 @@ def _create_oauth2_authorization_url(client, authorization_endpoint, **kwargs):
             log.debug('Using code_verifier: {!r}'.format(code_verifier))
 
         scope = kwargs.get('scope', client.scope)
-        if scope and scope.startswith('openid'):
+        if scope and 'openid' in scope.split():
             # this is an OpenID Connect service
             nonce = kwargs.get('nonce')
             if not nonce: