diff --git a/source/window.d b/source/window.d
index 1f554f9..caf0617 100644
--- a/source/window.d
+++ b/source/window.d
@@ -29,24 +29,45 @@ struct Window {
 	SDL_Window* window;
 	SDL_GLContext context;
 
-	extern(Windows) nothrow @nogc
-	static void openGLCallbackFunction(
-		GLenum source, GLenum type,
-		GLuint id, GLenum severity,
-		GLsizei length, const (GLchar)* message,
-		void* userParam)
-	{
+	version(Windows) {
+		extern(Windows) nothrow @nogc
+		static void openGLCallbackFunction(
+			GLenum source, GLenum type,
+			GLuint id, GLenum severity,
+			GLsizei length, const (GLchar)* message,
+			void* userParam)
+		{
 
-		printf("Message: %s \nSource: %s \nType: %s \nID: %d \nSeverity: %s\n\n",
-			message, to!(char*)(source), to!(char*)(type), id, to!(char*)(severity));
+			printf("Message: %s \nSource: %s \nType: %s \nID: %d \nSeverity: %s\n\n",
+				message, to!(char*)(source), to!(char*)(type), id, to!(char*)(severity));
 
-		if (severity == GL_DEBUG_SEVERITY_HIGH) {
-			printf("Aborting...\n");
-			import core.stdc.stdlib : exit;
-			exit(-1);
-		}
+			if (severity == GL_DEBUG_SEVERITY_HIGH) {
+				printf("Aborting...\n");
+				import core.stdc.stdlib : exit;
+				exit(-1);
+			}
 
-	} // openGLCallbackFunction
+		} // openGLCallbackFunction
+	} else {
+		extern(C) nothrow @nogc
+		static void openGLCallbackFunction(
+			GLenum source, GLenum type,
+			GLuint id, GLenum severity,
+			GLsizei length, const (GLchar*) message, // TODO: look at why it's GLchar* for non-windows and the other works on windows..
+			void* userParam)
+		{
+
+			printf("Message: %s \nSource: %s \nType: %s \nID: %d \nSeverity: %s\n\n",
+				message, to!(char*)(source), to!(char*)(type), id, to!(char*)(severity));
+
+			if (severity == GL_DEBUG_SEVERITY_HIGH) {
+				printf("Aborting...\n");
+				import core.stdc.stdlib : exit;
+				exit(-1);
+			}
+
+		} // openGLCallbackFunction
+	}
 
 	void createWindow(int w, int h, const char* title = "Chipd8 Emu") {
 		assert(w > 0, "window width must be > 0");
@@ -177,4 +198,4 @@ const (char*) to(T : char*)(GLenum value) {
 
 	}
 
-} // to!string(GLenum)
\ No newline at end of file
+} // to!string(GLenum)