diff --git a/drivers/mfd/mca-core.c b/drivers/mfd/mca-core.c
index 758218aa60cf..83255ff3eac0 100644
--- a/drivers/mfd/mca-core.c
+++ b/drivers/mfd/mca-core.c
@@ -1193,7 +1193,7 @@ struct mca_func_since mca_func_fwver[MCA_DEV_MAX][MCA_FUNC_MAX] = {
 		{MCA_FUNC_LEDS, 	MCA_MAKE_FW_VER(255, 255)},
 	},
 	[MCA_DEV_KL17] = {
-		{MCA_FUNC_UART, 	MCA_MAKE_FW_VER(1, 13)},
+		{MCA_FUNC_UART, 	MCA_MAKE_FW_VER(0, 13)},
 		{MCA_FUNC_TICK_COUNT, 	MCA_MAKE_FW_VER(0,  0)},
 		{MCA_FUNC_VREF, 	MCA_MAKE_FW_VER(0, 11)},
 		{MCA_FUNC_LAST_WAKEUP, 	MCA_MAKE_FW_VER(0,  4)},