diff --git a/target/linux/adm5120/files/arch/mips/adm5120/boards/mikrotik.c b/target/linux/adm5120/files/arch/mips/adm5120/boards/mikrotik.c
index 102fa5615..3d2facfd1 100644
--- a/target/linux/adm5120/files/arch/mips/adm5120/boards/mikrotik.c
+++ b/target/linux/adm5120/files/arch/mips/adm5120/boards/mikrotik.c
@@ -242,8 +242,10 @@ static void __init rb1xx_flash_setup(void)
 
 static void __init rb153_cf_setup(void)
 {
-	/* enable CSX1:INTX1 on GPIO 3:4 for the CF slot */
+	/* enable CSX1:INTX1 on GPIO[3:4] for the CF slot */
 	adm5120_gpio_csx1_enable();
+	/* enable the wait state pin GPIO[0] for external I/O control */
+	adm5120_gpio_ew_enable();
 
 	gpio_request(RB153_GPIO_CF_RDY, "cf-ready");
 	gpio_direction_input(RB153_GPIO_CF_RDY);
diff --git a/target/linux/adm5120/files/arch/mips/adm5120/gpio.c b/target/linux/adm5120/files/arch/mips/adm5120/gpio.c
index a6cfdcbe0..a9e6e6bdf 100644
--- a/target/linux/adm5120/files/arch/mips/adm5120/gpio.c
+++ b/target/linux/adm5120/files/arch/mips/adm5120/gpio.c
@@ -370,6 +370,8 @@ void __init adm5120_gpio_ew_enable(void)
 	t = SW_READ_REG(GPIO_CONF2);
 	t |= GPIO_CONF2_EW;
 	SW_WRITE_REG(GPIO_CONF2, t);
+
+	adm5120_gpio_map[ADM5120_GPIO_PIN0].flags &= ~GPIO_FLAG_VALID;
 }
 
 void __init adm5120_gpio_init(void)