diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-wp543.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-wp543.c
index 148cd7c7f2..0c890ea97d 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-wp543.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-wp543.c
@@ -65,7 +65,7 @@ static struct gpio_keys_button wp543_gpio_keys[] __initdata = {
 	}, {
 		.desc		= "sw4",
 		.type		= EV_KEY,
-		.code		= BTN_1,
+		.code		= KEY_RESTART,
 		.debounce_interval = WP543_KEYS_DEBOUNCE_INTERVAL,
 		.gpio		= WP543_GPIO_SW4,
 	}