3 files changed, 12 insertions, 3 deletions
diff --git a/include/CompilerKit/Utilities/Assembler.h b/include/CompilerKit/Utilities/Assembler.h
index e13f1af..e43d451 100644
--- a/include/CompilerKit/Utilities/Assembler.h
+++ b/include/CompilerKit/Utilities/Assembler.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef NECTAR_COMPILERKIT_UTILITIES_ASSEMBLER_H
+#define NECTAR_COMPILERKIT_UTILITIES_ASSEMBLER_H
 
 #include <CompilerKit/AST.h>
 #include <CompilerKit/CodeGenerator.h>
@@ -94,3 +95,5 @@ inline NumberCast32 GetNumber32(STLString lineBuffer, STLString numberKey) {
   }
 }
 }  // namespace CompilerKit
+
+#endif  // NECTAR_COMPILERKIT_UTILITIES_ASSEMBLER_H
diff --git a/include/CompilerKit/Utilities/Compiler.h b/include/CompilerKit/Utilities/Compiler.h
index 94060ea..8d00de0 100644
--- a/include/CompilerKit/Utilities/Compiler.h
+++ b/include/CompilerKit/Utilities/Compiler.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef NECTAR_COMPILERKIT_UTILITIES_COMPILER_H
+#define NECTAR_COMPILERKIT_UTILITIES_COMPILER_H
 
 #include <CompilerKit/AST.h>
 #include <CompilerKit/CodeGenerator.h>
@@ -120,3 +121,5 @@ inline void drvi_crash_handler(std::int32_t id) {
 }
 }  // namespace CompilerKit::Detail
 
+#endif  // NECTAR_COMPILERKIT_UTILITIES_COMPILER_H
+
diff --git a/include/CompilerKit/Utilities/DLL.h b/include/CompilerKit/Utilities/DLL.h
index c6fcd49..1f84bb8 100644
--- a/include/CompilerKit/Utilities/DLL.h
+++ b/include/CompilerKit/Utilities/DLL.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef NECTAR_COMPILERKIT_UTILITIES_DLL_H
+#define NECTAR_COMPILERKIT_UTILITIES_DLL_H
 
 #include <CompilerKit/Detail/Config.h>
 #include <dlfcn.h>
@@ -68,3 +69,5 @@ class DLLLoader final {
 };
 }  // namespace CompilerKit
 
+#endif  // NECTAR_COMPILERKIT_UTILITIES_DLL_H
+