diff --git a/Firmware/Src/gpio.c b/Firmware/Src/gpio.c
index 6af27891..ad624666 100644
--- a/Firmware/Src/gpio.c
+++ b/Firmware/Src/gpio.c
@@ -196,6 +196,8 @@ void SetGPIO12toStepDir() {
 }
 
 void SetupENCIndexGPIO(){
+  GPIO_InitTypeDef GPIO_InitStruct;
+  
   /*Configure GPIO pins : PAPin PAPin */
   GPIO_InitStruct.Pin = GPIO_4_Pin|M0_ENC_Z_Pin;
   GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;