diff --git a/src/Makefile b/src/Makefile
index f2d532cd5..fd25f6da9 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -68,6 +68,8 @@
 # Addon for SDL:
 #     To Cross-Compile, add 'SDL_CONFIG=/usr/*/bin/sdl-config'
 #     Compile without SDL_Mixer, add 'NOMIXER=1'
+#     Compile without SDL_Mixer_X, add 'NOMIXERX=1' (Win32 only)
+#     Compile without GME, add 'NOGME=1'
 #     Compile without BSD API, add 'NONET=1'
 #     Compile without IPX/SPX, add 'NOIPX=1'
 #     Compile Mingw/SDL with S_DS3S, add 'DS3D=1'