Fix typo
diff --git a/src/app_engine/apprtc.py b/src/app_engine/apprtc.py
index b70acfe..b7a17b3 100755
--- a/src/app_engine/apprtc.py
+++ b/src/app_engine/apprtc.py
@@ -277,7 +277,7 @@
     'turnRequestUrl': turn_url,
     'turnTransports': turn_transports,
     'wssUrl': wss_url,
-    'wssPost_url': wss_post_url,
+    'wssPostUrl': wss_post_url,
     'bypassJoinConfirmation': bypass_join_confirmation,
     'versionInfo': get_version_info()
   }