diff --git a/homeassistant/components/knx/__init__.py b/homeassistant/components/knx/__init__.py
index 7dbeb513e09..1492e5df7b7 100644
--- a/homeassistant/components/knx/__init__.py
+++ b/homeassistant/components/knx/__init__.py
@@ -290,7 +290,7 @@ class KNXModule:
         if CONF_KNX_ROUTING in self.config[DOMAIN]:
             return self.connection_config_routing()
         # config from xknx.yaml always has priority later on
-        return ConnectionConfig()
+        return ConnectionConfig(auto_reconnect=True)
 
     def connection_config_routing(self):
         """Return the connection_config if routing is configured."""