diff --git a/homeassistant/components/knx/__init__.py b/homeassistant/components/knx/__init__.py
index c252572e28e..8f363ac70d1 100644
--- a/homeassistant/components/knx/__init__.py
+++ b/homeassistant/components/knx/__init__.py
@@ -368,11 +368,15 @@ class KNXModule:
         local_ip = self.config[DOMAIN][CONF_KNX_TUNNELING].get(
             ConnectionSchema.CONF_KNX_LOCAL_IP
         )
+        route_back = self.config[DOMAIN][CONF_KNX_TUNNELING][
+            ConnectionSchema.CONF_KNX_ROUTE_BACK
+        ]
         return ConnectionConfig(
             connection_type=ConnectionType.TUNNELING,
             gateway_ip=gateway_ip,
             gateway_port=gateway_port,
             local_ip=local_ip,
+            route_back=route_back,
             auto_reconnect=True,
         )
 
diff --git a/homeassistant/components/knx/schema.py b/homeassistant/components/knx/schema.py
index 6ff9d295b75..bfb8ba62c39 100644
--- a/homeassistant/components/knx/schema.py
+++ b/homeassistant/components/knx/schema.py
@@ -59,12 +59,14 @@ class ConnectionSchema:
     """Voluptuous schema for KNX connection."""
 
     CONF_KNX_LOCAL_IP = "local_ip"
+    CONF_KNX_ROUTE_BACK = "route_back"
 
     TUNNELING_SCHEMA = vol.Schema(
         {
             vol.Optional(CONF_PORT, default=DEFAULT_MCAST_PORT): cv.port,
             vol.Required(CONF_HOST): cv.string,
             vol.Optional(CONF_KNX_LOCAL_IP): cv.string,
+            vol.Optional(CONF_KNX_ROUTE_BACK, default=False): cv.boolean,
         }
     )