diff --git a/main.h b/main.h
--- a/main.h
+++ b/main.h
@@ -1,6 +1,8 @@
 #ifndef __MAIN_H
 #define __MAIN_H
 
+#include "stm32f0xx_hal_conf.h"
+
 void TimingDelay_Decrement(void);
 void delay(__IO uint32_t nTime);