diff --git a/src/video/quartz/SDL_QuartzVideo.m b/src/video/quartz/SDL_QuartzVideo.m
index 0b49a3793..7f54dfd74 100644
--- a/src/video/quartz/SDL_QuartzVideo.m
+++ b/src/video/quartz/SDL_QuartzVideo.m
@@ -213,6 +213,9 @@ static int QZ_VideoInit (_THIS, SDL_PixelFormat *video_format) {
     /* register for sleep notifications so wake from sleep generates SDL_VIDEOEXPOSE */
     QZ_RegisterForSleepNotifications (this);
     
+    /* Fill in some window manager capabilities */
+    this->info.wm_available = 1;
+
     return 0;
 }