diff --git a/source/firmware/arch/stm32f4xx/board/stm32f4-discovery/include/stm32f4-discovery.h b/source/firmware/arch/stm32f4xx/board/stm32f4-discovery/include/stm32f4-discovery.h
index 31d080c..c715c95 100755
--- a/source/firmware/arch/stm32f4xx/board/stm32f4-discovery/include/stm32f4-discovery.h
+++ b/source/firmware/arch/stm32f4xx/board/stm32f4-discovery/include/stm32f4-discovery.h
@@ -351,7 +351,7 @@ const struct driver gpio_c2 = {
 
 // GPIO_C3
 static const GPIO_InitTypeDef port_cfg_C3 = {
-		GPIO_Pin_1,
+		GPIO_Pin_3,
 		GPIO_Mode_OUT,
 		GPIO_Speed_100MHz,
 		GPIO_OType_PP,