diff --git a/components/ratgdo/binary_sensor/ratgdo_binary_sensor.cpp b/components/ratgdo/binary_sensor/ratgdo_binary_sensor.cpp
index 1547b54..354379f 100644
--- a/components/ratgdo/binary_sensor/ratgdo_binary_sensor.cpp
+++ b/components/ratgdo/binary_sensor/ratgdo_binary_sensor.cpp
@@ -24,7 +24,7 @@ namespace ratgdo {
     }
     void RATGDOBinarySensor::on_door_state(DoorState state) { }
     void RATGDOBinarySensor::on_light_state(LightState state) { }
-    void RATGDOBinarySensor::on_lock_state(:LockState state) { }
+    void RATGDOBinarySensor::on_lock_state(LockState state) { }
 
 } // namespace ratgdo
 } // namespace esphome