diff --git a/gaugemqttcontinuous.py b/gaugemqttcontinuous.py
index bb86773..ce52b28 100644
--- a/gaugemqttcontinuous.py
+++ b/gaugemqttcontinuous.py
@@ -855,6 +855,7 @@ def main():
         pass
 
     global _bl_dirty_since
+    global _disco_end_time, _disco_saved_brightness, _disco_saved_color
     last_heartbeat = utime.ticks_ms()
 
     while True: