diff --git a/board/nm/nmhw21/mux.c b/board/nm/nmhw21/mux.c
index cbd9b5e7fd..0b3c9e3593 100644
--- a/board/nm/nmhw21/mux.c
+++ b/board/nm/nmhw21/mux.c
@@ -57,7 +57,7 @@ static struct module_pin_mux gpio_pin_mux[] = {
 	{OFFSET(gpmc_wait0), (MODE(7) | PULLUDDIS)},				/* (T17) GPIO0_30: LED0.GN */
 
 	/* Bank 1 */
-	{OFFSET(gpmc_ad12), (MODE(7) | PULLUDDIS)},				/* (T12) GPIO1_12: SIM_SW */
+	{OFFSET(gpmc_ad12), (MODE(7) | PULLUDEN | PULLUP_EN)},			/* (T12) GPIO1_12: SIM_SW */
 	{OFFSET(gpmc_ad14), (MODE(7) | PULLUDDIS)},				/* (V13) GPIO1_14: GNSS_RST~ */
 	{OFFSET(gpmc_ad15), (MODE(7) | PULLUDDIS)},				/* (U13) GPIO1_15: CAN_TERM0~ */