diff --git a/Base/Base.hpp b/Base/Base.hpp
index 28c8cd5..10cb3d6 100644
--- a/Base/Base.hpp
+++ b/Base/Base.hpp
@@ -1,19 +1,21 @@
 // Copyright 2025 Atalante.
 // Licensed under MIT.
 
-#pragma once
+#ifndef ATL_MODULE_BASE
+	#define ATL_MODULE_BASE
 
-#include <cfloat>
-#include <cstdint>
-#include <cstdlib>
+	#include <cfloat>
+	#include <cstdint>
+	#include <cstdlib>
 
-#include "Context.hpp"
-#include "Macros.hpp"
+	#include "Context.hpp"
+	#include "Macros.hpp"
 
-#include "Aliases.hpp"
-#include "Limits.hpp"
-#include "Cast.hpp"
-#include "Utilities.hpp"
-#include "Bit.hpp"
-#include "Types/sequence.hpp"
-#include "Types/view.hpp"
\ No newline at end of file
+	#include "Aliases.hpp"
+	#include "Limits.hpp"
+	#include "Cast.hpp"
+	#include "Utilities.hpp"
+	#include "Bit.hpp"
+	#include "Types/sequence.hpp"
+	#include "Types/view.hpp"
+#endif
\ No newline at end of file