diff --git a/flight/PiOS/STM32F10x/pios_debug.c b/flight/PiOS/STM32F10x/pios_debug.c
index 63539c8d1..ca4f67dc5 100644
--- a/flight/PiOS/STM32F10x/pios_debug.c
+++ b/flight/PiOS/STM32F10x/pios_debug.c
@@ -104,8 +104,8 @@ void PIOS_DEBUG_PinLow(uint8_t Pin)
 void PIOS_DEBUG_PinValue8Bit(uint8_t value)
 {
 #ifdef PIOS_ENABLE_DEBUG_PINS
-	uint32_t bsrr_l = ((~(value & 0x0F)<<(16+6))) | ((value & 0x0F)<<6);
-	uint32_t bsrr_h = ((~(value & 0xF0)<<(16+6-4))) | ((value & 0xF0)<<(6-4));
+	uint32_t bsrr_l = ( ((~value)&0x0F)<<(16+6)   ) | ((value & 0x0F)<<6);
+	uint32_t bsrr_h = ( ((~value)&0xF0)<<(16+6-4) ) | ((value & 0xF0)<<(6-4));
 	PIOS_IRQ_Disable();
 	PIOS_SERVO_GPIO_PORT_1TO4->BSRR = bsrr_l;
 	PIOS_SERVO_GPIO_PORT_5TO8->BSRR = bsrr_h;