diff --git a/STM32F4/cores/maple/libmaple/gpio.h b/STM32F4/cores/maple/libmaple/gpio.h
index f1a141f..dcf1151 100644
--- a/STM32F4/cores/maple/libmaple/gpio.h
+++ b/STM32F4/cores/maple/libmaple/gpio.h
@@ -59,7 +59,7 @@ static inline afio_exti_port gpio_exti_port(const gpio_dev *dev) {
  * @param pin Pin on to set or reset
  * @param val If true, set the pin.  If false, reset the pin.
  */
-static inline void gpio_write_pin(uint8_t pin, uint8 val) {
+static inline void gpio_write_pin(uint8_t pin, uint16 val) {
     if (val) {
         (PIN_MAP[pin].gpio_device)->regs->BSRRL = BIT(pin&0x0F);
     } else {
diff --git a/STM32F4/cores/maple/wirish_digital.cpp b/STM32F4/cores/maple/wirish_digital.cpp
index 4a65619..4769051 100644
--- a/STM32F4/cores/maple/wirish_digital.cpp
+++ b/STM32F4/cores/maple/wirish_digital.cpp
@@ -94,7 +94,7 @@ uint32 digitalRead(uint8 pin)
         HIGH : LOW;
 }
 
-void digitalWrite(uint8 pin, uint8 val)
+void digitalWrite(uint8 pin, uint16 val)
 {
     if (pin >= BOARD_NR_GPIO_PINS) {
         return;