diff --git a/src/lv_core/lv_obj.c b/src/lv_core/lv_obj.c
index df6ed672b..dc0db2d8c 100644
--- a/src/lv_core/lv_obj.c
+++ b/src/lv_core/lv_obj.c
@@ -1457,7 +1457,7 @@ lv_obj_user_data_t lv_obj_get_user_data(const lv_obj_t * obj)
  * @param obj pointer to an object
  * @return pointer to the user data
  */
-lv_obj_user_data_t * lv_obj_get_user_data_ptr(const lv_obj_t * obj)
+lv_obj_user_data_t * lv_obj_get_user_data_ptr(lv_obj_t * obj)
 {
     LV_ASSERT_OBJ(obj, LV_OBJX_NAME);