diff --git a/ui/sdl.c b/ui/sdl.c
index 9994490..a260002 100644
--- a/ui/sdl.c
+++ b/ui/sdl.c
@@ -265,6 +265,7 @@ static void *sdl__thread(void *p)
 		return NULL;
 	}
 exit:
+	done = true;
 	kvm_cpu__reboot(fb->kvm);
 
 	return NULL;