diff --git a/Src/ztLed.hpp b/Src/ztLed.hpp
index a1a8e17..8f5e1c8 100644
--- a/Src/ztLed.hpp
+++ b/Src/ztLed.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "stm32f10x.h"
 #include "stm32f10x_gpio.h"
 #include "stm32f10x_rcc.h"