diff --git a/src/video/gem/SDL_gemvideo.c b/src/video/gem/SDL_gemvideo.c
index eea9863d3..0e87d2946 100644
--- a/src/video/gem/SDL_gemvideo.c
+++ b/src/video/gem/SDL_gemvideo.c
@@ -467,6 +467,8 @@ int GEM_VideoInit(_THIS, SDL_PixelFormat *vformat)
 	SDL_AtariGL_InitPointers(this);
 #endif
 
+	video->info.wm_available = 1;
+
 	/* We're done! */
 	return(0);
 }