diff --git a/main/src/main.c b/main/src/main.c
index d6f3770..7a8de81 100644
--- a/main/src/main.c
+++ b/main/src/main.c
@@ -111,10 +111,11 @@ static lv_display_t * hal_init(int32_t w, int32_t h)
 
   lv_indev_t * mousewheel = lv_sdl_mousewheel_create();
   lv_indev_set_display(mousewheel, disp);
+  lv_indev_set_group(mousewheel, lv_group_get_default());
 
   lv_indev_t * kb = lv_sdl_keyboard_create();
   lv_indev_set_display(kb, disp);
   lv_indev_set_group(kb, lv_group_get_default());
 
   return disp;
-}
\ No newline at end of file
+}