diff --git a/global.hpp b/global.hpp
index 71e5d2c..220d423 100644
--- a/global.hpp
+++ b/global.hpp
@@ -1,5 +1,10 @@
+#ifndef GLOBAL_HPP
+#define GLOBAL_HPP
+
 int INITIAL_SCREEN_WIDTH = 640;
 int INITIAL_SCREEN_HEIGHT = 200;
 int SCREEN_WIDTH = INITIAL_SCREEN_WIDTH;
 int SCREEN_HEIGHT = INITIAL_SCREEN_HEIGHT;
-const std::string HELP = "Version 3.0 Game of the Year, Press Edition\nHELP\nIn CubiGrav your goal is to get the furthest without touching any obstacle.\nTo do this you can change your position from the roof to the ceiling using th Up and Down keys.";
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+const std::string HELP = "Version 3.0 Game of the Year, Press Edition\nHELP\nIn CubiGrav your goal is to get the furthest without touching any obstacle.\nTo do this you can change your position from the roof to the ceiling using th Up and Down keys.";
+
+#endif
\ No newline at end of file