diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
index 78b033358625..db56e465aaff 100644
--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -179,6 +179,7 @@ ATTRIBUTE_GROUPS(lcd_device);
  * lcd_device_register - register a new object of lcd_device class.
  * @name: the name of the new object(must be the same as the name of the
  *   respective framebuffer device).
+ * @parent: pointer to the parent's struct device .
  * @devdata: an optional pointer to be stored in the device. The
  *   methods may retrieve it by using lcd_get_data(ld).
  * @ops: the lcd operations structure.