diff --git a/reactos/dll/win32/winmm/winmm.spec b/reactos/dll/win32/winmm/winmm.spec
index 9b600dbae7a..87104fb740a 100644
--- a/reactos/dll/win32/winmm/winmm.spec
+++ b/reactos/dll/win32/winmm/winmm.spec
@@ -26,6 +26,11 @@
 @ stdcall auxGetVolume(long ptr)
 @ stdcall auxOutMessage(long long long long)
 @ stdcall auxSetVolume(long long)
+@ stub gfxBatchChange
+@ stub gfxCreateGfxFactoriesList
+@ stub gfxDestroyDeviceInterfaceList
+@ stub gfxEnumerateGfxs
+@ stub gfxOpenGfx
 @ stdcall joyConfigChanged(long)
 @ stdcall joyGetDevCapsA(long ptr long)
 @ stdcall joyGetDevCapsW(long ptr long)