diff --git a/src/flask_socketio/__init__.py b/src/flask_socketio/__init__.py
index 83a93ffa..a3dab456 100644
--- a/src/flask_socketio/__init__.py
+++ b/src/flask_socketio/__init__.py
@@ -632,9 +632,9 @@ def run(self, app, host=None, port=None, **kwargs):  # pragma: no cover
                 from werkzeug._internal import _log
                 _log('warning', 'WebSocket transport not available. Install '
                                 'simple-websocket for improved performance.')
+            allow_unsafe_werkzeug = kwargs.pop('allow_unsafe_werkzeug',
+                                               False)
             if not sys.stdin or not sys.stdin.isatty():  # pragma: no cover
-                allow_unsafe_werkzeug = kwargs.pop('allow_unsafe_werkzeug',
-                                                   False)
                 if not allow_unsafe_werkzeug:
                     raise RuntimeError('The Werkzeug web server is not '
                                        'designed to run in production. Pass '