diff --git a/main.h b/main.h
--- a/main.h
+++ b/main.h
@@ -5,7 +5,7 @@
 #include "stm32l100c_discovery.h"
 
 void TimingDelay_Decrement(void);
-void Delay(__IO uint32_t nTime);
+void delay(__IO uint32_t nTime);
 
 #endif /* __MAIN_H */