diff --git a/readref.c b/readref.c
index 9e1fad8..1877f15 100644
--- a/readref.c
+++ b/readref.c
@@ -126,7 +126,7 @@ int main()
     }
 
     // mqtt
-    mqtt = connectMqtt(MQTT_USER, MQTT_PASS, onMessage);
+    mqtt = connectMqtt(MQTT_USER1, MQTT_PASS, onMessage);
     if (mqtt == NULL)
     {
         exit(EXIT_FAILURE);