3 files changed, 13 insertions, 7 deletions
diff --git a/include/ocl/fix/checksum.hpp b/include/ocl/fix/checksum.hpp
index 204fc23..f124a08 100644
--- a/include/ocl/fix/checksum.hpp
+++ b/include/ocl/fix/checksum.hpp
@@ -5,10 +5,13 @@
  * Copyright 2025, Amlal El Mahrouss, licensed under the Boost Software License.
  */
 
-#pragma once
+#ifndef __OCL_FIX_CHECKSUM
+#define __OCL_FIX_CHECKSUM
 
 #include <ocl/fix/detail/config.hpp>
 
 namespace ocl::fix
 {
-}
-\ No newline at end of file
+}
+
+#endif 
+\ No newline at end of file
diff --git a/include/ocl/fix/detail/config.hpp b/include/ocl/fix/detail/config.hpp
index d1ac4fa..8d10b8b 100644
--- a/include/ocl/fix/detail/config.hpp
+++ b/include/ocl/fix/detail/config.hpp
@@ -5,8 +5,11 @@
  * Copyright 2025, Amlal El Mahrouss, licensed under the Boost Software License.
  */
 
-#pragma once
+#ifndef __OCL_FIX_CONFIG
+#define __OCL_FIX_CHECKSUM
 
 #include <ocl/detail/config.hpp>
 #include <ocl/crc_hash.hpp>
-#include <ocl/print.hpp>
-\ No newline at end of file
+#include <ocl/print.hpp>
+
+#endif
+\ No newline at end of file
diff --git a/include/ocl/fix/parser.hpp b/include/ocl/fix/parser.hpp
index 43daa69..139f171 100644
--- a/include/ocl/fix/parser.hpp
+++ b/include/ocl/fix/parser.hpp
@@ -5,8 +5,8 @@
  * Copyright 2025, Amlal El Mahrouss, licensed under the Boost Software License.
  */
 
-#ifndef _OCL_FIX_PARSER_HPP
-#define _OCL_FIX_PARSER_HPP
+#ifndef __OCL_FIX_PARSER
+#define __OCL_FIX_PARSER
 
 #include <ocl/fix/detail/config.hpp>
 #include <string>
@@ -160,4 +160,4 @@ namespace ocl::fix
 	};
 } // namespace ocl::fix
 
-#endif // ifndef _OCL_FIX_PARSER_HPP
-\ No newline at end of file
+#endif // ifndef __OCL_FIX_PARSER
+\ No newline at end of file