--- a/pytouhou/options.py
+++ b/pytouhou/options.py
@@ -140,6 +140,7 @@ def parse_arguments(defaults):
     netplay_group.add_argument('--friendly-fire', action='store_true', help='Allow friendly-fire during netplay.')
 
     graphics_group = parser.add_argument_group('Graphics options')
+    graphics_group.add_argument('--frontend', metavar='FRONTEND', choices=['glfw', 'sdl'], help='Which windowing library to use (glfw or sdl).')
     graphics_group.add_argument('--backend', metavar='BACKEND', choices=['opengl', 'sdl'], nargs='*', help='Which backend to use (opengl or sdl).')
     graphics_group.add_argument('--fps-limit', metavar='FPS', type=int, help='Set fps limit. A value of 0 disables fps limiting, while a negative value limits to 60 fps if and only if vsync doesn’t work.')
     graphics_group.add_argument('--frameskip', metavar='FRAMESKIP', type=int, help='Set the frameskip, as 1/FRAMESKIP, or disabled if 0.')