diff --git a/utils/Renderer/Renderer.h b/utils/Renderer/Renderer.h
index f27d003..41e7f2c 100644
--- a/utils/Renderer/Renderer.h
+++ b/utils/Renderer/Renderer.h
@@ -1,5 +1,5 @@
-#ifndef RENDERER
-#define RENDERER
+#ifndef RENDERER_H
+#define RENDERER_H
 
 #include "Archimedes.h"
 
diff --git a/utils/Window/Window.h b/utils/Window/Window.h
index 6922045..9d612c7 100644
--- a/utils/Window/Window.h
+++ b/utils/Window/Window.h
@@ -1,3 +1,6 @@
+#ifndef WINDOW_H
+#define WINDOW_H
+
 #include "Archimedes.h"
 #include "Renderer/Renderer.h"
 #include "WindowGLFW/WindowGLFW.h"
@@ -23,3 +26,5 @@ namespace Archimedes {
             WindowImpl window;
     };
 }
+
+#endif