diff --git a/authlib/integrations/base_client/base_app.py b/authlib/integrations/base_client/base_app.py
index 3df09a10..ee402d36 100644
--- a/authlib/integrations/base_client/base_app.py
+++ b/authlib/integrations/base_client/base_app.py
@@ -143,10 +143,9 @@ def retrieve_access_token_params(self, request, request_token=None):
             params['request_token'] = request_token
         else:
             params = self._retrieve_oauth2_access_token_params(request, params)
-
-        redirect_uri = self.framework.get_session_data(request, 'redirect_uri')
-        if redirect_uri:
-            params['redirect_uri'] = redirect_uri
+            redirect_uri = self.framework.get_session_data(request, 'redirect_uri')
+            if redirect_uri:
+                params['redirect_uri'] = redirect_uri
 
         log.debug('Retrieve temporary data: {!r}'.format(params))
         return params