diff --git a/plugins/PY/pinpointPy/Fastapi/FastAPIRequestPlugin.py b/plugins/PY/pinpointPy/Fastapi/FastAPIRequestPlugin.py
index d96c4b760..8559caee2 100644
--- a/plugins/PY/pinpointPy/Fastapi/FastAPIRequestPlugin.py
+++ b/plugins/PY/pinpointPy/Fastapi/FastAPIRequestPlugin.py
@@ -45,9 +45,9 @@ def onEnd(self, traceId, response: Response):
         # fix bug in in fastapi/docs
         ut = '/'
         if 'root_path' in self.request.scope:
-            ut += self.request.scope['root_path']
+            ut = self.request.scope['root_path']
         if 'route' in self.request.scope:
-            ut += self.request.scope['route'].path
+            ut = self.request.scope['route'].path
 
         pinpoint.add_trace_header(Defines.PP_URL_TEMPLATED, ut, traceId)