diff --git a/docker-compose/tango-prometheus-exporter/code/tango-prometheus-client.py b/docker-compose/tango-prometheus-exporter/code/tango-prometheus-client.py
index 489d5282acff1618d2c436a741f1a3c5d9f6db3b..aaffe96637aefb3aafd83acc2deb7a1ce43915fd 100644
--- a/docker-compose/tango-prometheus-exporter/code/tango-prometheus-client.py
+++ b/docker-compose/tango-prometheus-exporter/code/tango-prometheus-client.py
@@ -64,7 +64,7 @@ class ArchiverPolicy(object):
         return sorted(list(attributes))
 
 class CustomCollector(object):
-    def __init__(self, station, config, proxy_timeout=250):
+    def __init__(self, config, station, proxy_timeout=250):
         self.station = station
         self.policy = ArchiverPolicy(config)
         self.proxy_timeout = proxy_timeout