diff --git a/Universal_Serial_Adapter/UIJoystickPSP.h b/Universal_Serial_Adapter/UIJoystickPSP.h
index 57cd7c7..f998003 100644
--- a/Universal_Serial_Adapter/UIJoystickPSP.h
+++ b/Universal_Serial_Adapter/UIJoystickPSP.h
@@ -10,6 +10,9 @@
 
 #include "Project.h"
 
+#ifndef UIJoystickPSP_h
+#define UIJoystickPSP_h
+
 enum joyDirection { 
   joyUp,
   joyDown,
@@ -32,4 +35,6 @@ private:
 public:
 	UIJoystickPSP(int xAxisPin, int yAxisPin);
 	joyDirection direction();
-};
\ No newline at end of file
+};
+
+#endif
\ No newline at end of file