diff --git a/binding-mri/graphics-binding.cpp b/binding-mri/graphics-binding.cpp
index bcb44b6..87cb89c 100644
--- a/binding-mri/graphics-binding.cpp
+++ b/binding-mri/graphics-binding.cpp
@@ -209,15 +209,6 @@ RB_METHOD(graphicsResizeWindow)
 	return Qnil;
 }
 
-RB_METHOD(graphicsMaximizeWindow)
-{
-	RB_UNUSED_PARAM;
-
-	shState->eThread().requestWindowMaximize();
-
-	return Qnil;
-}
-
 DEF_GRA_PROP_I(FrameRate)
 DEF_GRA_PROP_I(FrameCount)
 DEF_GRA_PROP_I(Brightness)
@@ -277,5 +268,4 @@ void graphicsBindingInit()
 	INIT_GRA_PROP_BIND( ShowCursor, "show_cursor" );
 
 	_rb_define_module_function(module, "resize_window", graphicsResizeWindow);
-	_rb_define_module_function(module, "maximize_window", graphicsMaximizeWindow);
 }
diff --git a/src/eventthread.cpp b/src/eventthread.cpp
index 8be64df..12d7406 100644
--- a/src/eventthread.cpp
+++ b/src/eventthread.cpp
@@ -40,12 +40,12 @@
 
 #include <string.h>
 
-typedef void (ALC_APIENTRY *_LPALCDEVICEPAUSESOFT) (ALCdevice *device);
-typedef void (ALC_APIENTRY *_LPALCDEVICERESUMESOFT) (ALCdevice *device);
+typedef void (ALC_APIENTRY *LPALCDEVICEPAUSESOFT) (ALCdevice *device);
+typedef void (ALC_APIENTRY *LPALCDEVICERESUMESOFT) (ALCdevice *device);
 
 #define AL_DEVICE_PAUSE_FUN \
-	AL_FUN(DevicePause, _LPALCDEVICEPAUSESOFT) \
-	AL_FUN(DeviceResume, _LPALCDEVICERESUMESOFT)
+	AL_FUN(DevicePause, LPALCDEVICEPAUSESOFT) \
+	AL_FUN(DeviceResume, LPALCDEVICERESUMESOFT)
 
 struct ALCFunctions
 {
@@ -80,7 +80,6 @@ enum
 {
 	REQUEST_SETFULLSCREEN = 0,
 	REQUEST_WINRESIZE,
-	REQUEST_WINMAXIMIZE,
 	REQUEST_MESSAGEBOX,
 	REQUEST_SETCURSORVISIBLE,
 
@@ -460,10 +459,6 @@ void EventThread::process(RGSSThreadData &rtData)
 				updateCursorState(cursorInWindow, gameScreen);
 				break;
 
-			case REQUEST_WINMAXIMIZE :
-				SDL_MaximizeWindow(win);
-				break;
-
 			case UPDATE_FPS :
 				if (rtData.config.printFPS)
 					Debug() << "FPS:" << event.user.code;
@@ -627,13 +622,6 @@ void EventThread::requestWindowResize(int width, int height, bool recenter)
 	SDL_PushEvent(&event);
 }
 
-void EventThread::requestWindowMaximize()
-{
-	SDL_Event event;
-	event.type = usrIdStart + REQUEST_WINMAXIMIZE;
-	SDL_PushEvent(&event);
-}
-
 void EventThread::requestShowCursor(bool mode)
 {
 	SDL_Event event;
diff --git a/src/eventthread.h b/src/eventthread.h
index 2352f79..2ad7ec6 100644
--- a/src/eventthread.h
+++ b/src/eventthread.h
@@ -89,7 +89,6 @@ public:
 	/* Called from RGSS thread */
 	void requestFullscreenMode(bool mode);
 	void requestWindowResize(int width, int height, bool recenter = false);
-	void requestWindowMaximize();
 	void requestShowCursor(bool mode);
 
 	void requestTerminate();