diff --git a/src/superio/nuvoton/wpcm450/superio.c b/src/superio/nuvoton/wpcm450/superio.c
index fa7a8a0f83..99abfe428b 100644
--- a/src/superio/nuvoton/wpcm450/superio.c
+++ b/src/superio/nuvoton/wpcm450/superio.c
@@ -47,7 +47,7 @@ static struct pnp_info pnp_dev_info[] = {
 	{ NULL, WPCM450_SP2,  PNP_IO0 | PNP_IRQ0 | PNP_DRQ0 | PNP_DRQ1,
 		0x07f8, },
 	{ NULL, WPCM450_SP1,  PNP_IO0 | PNP_IRQ0, 0x07f8, },
-	{ NULL, WPCM450_KBCK, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x07f8, 0x07f8, },
+	{ NULL, WPCM450_KBCK, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x07ff, 0x07ff, },
 };
 
 static void enable_dev(struct device *dev)