diff --git a/pnut-bridge.py b/pnut-bridge.py
index 5c4cda1..586eadb 100644
--- a/pnut-bridge.py
+++ b/pnut-bridge.py
@@ -72,6 +72,17 @@ class ChannelMonitor(threading.Thread):
             'user_id': user_id
         }
         r = requests.post(url, params=params)
+        if r.status_code == 403:
+            self.invite_room(user_id, roomid)
+            requests.post(url, params=params)
+
+    def invite_room(self, user_id, roomid):
+        url = self.matrix_api_url + '/rooms/' + roomid + "/invite"
+        params = {
+            'access_token': self.matrix_api_token,
+            'user_id': user_id
+        }
+        r = requests.post(url, params=params)
 
     def send_message(self, roomid, msg):
         url = self.matrix_api_url + '/rooms/' + roomid +'/send/m.room.message' + '/' + str(self.txId)