diff --git a/tuya_iot/openmq.py b/tuya_iot/openmq.py
index 07936e0..3573c4f 100644
--- a/tuya_iot/openmq.py
+++ b/tuya_iot/openmq.py
@@ -160,7 +160,6 @@ def run(self):
             try:
                 self.__run_mqtt()
                 backoff_seconds = 1
-
                 # reconnect every 2 hours required.
                 time.sleep(self.mq_config.expire_time - 60)
             except RequestException as e:
@@ -175,6 +174,8 @@ def __run_mqtt(self):
         mq_config = self._get_mqtt_config()
         if mq_config is None:
             logger.error("error while get mqtt config")
+            if self.mq_config is None:  # if we have no initial mq_config this is a big problem.
+                raise RequestException()
             return
 
         self.mq_config = mq_config