diff --git a/uisimulator/app.c b/uisimulator/app.c
index fdef22b6cb..9222172d22 100644
--- a/uisimulator/app.c
+++ b/uisimulator/app.c
@@ -85,6 +85,5 @@ void app_main(void)
       break;
     }
     lcd_update();
-    sleep(1);
   }
 }