diff --git a/src/core/lv_obj_style.h b/src/core/lv_obj_style.h
index f6d30507e..0ccbb23f4 100644
--- a/src/core/lv_obj_style.h
+++ b/src/core/lv_obj_style.h
@@ -67,10 +67,10 @@ void _lv_obj_style_init(void);
 /**
  * Add a style to an object.
  * @param obj       pointer to an object
- * @param part      a part of the object to which the style should be added E.g. `LV_PART_MAIN` or `LV_PART_KNOB`
- * @param state     a state or combination of states to which the style should be assigned
  * @param style     pointer to a style to add
- * @example         lv_obj_add_style_no_refresh(slider, LV_PART_KNOB, LV_STATE_PRESSED, &style1);
+ * @param selector  OR-ed value of parts and state to which the style should be added
+ * @example         lv_obj_add_style(btn, &style_btn, 0); //Default button style
+ * @example         lv_obj_add_style(btn, &btn_red, LV_STATE_PRESSED); //Overwrite only some colors to red when pressed
  */
 void lv_obj_add_style(struct _lv_obj_t * obj, lv_style_t * style, lv_style_selector_t selector);
 
@@ -79,9 +79,9 @@ void lv_obj_add_style(struct _lv_obj_t * obj, lv_style_t * style, lv_style_selec
  * @param obj       pointer to an object
  * @param style     pointer to a style to remove. Can be NULL to check only the selector
  * @param selector  OR-ed values of states and a part to remove only styles with matching selectors. LV_STATE_ANY and LV_PART_ANY can be used
- * @example lv_obj_remove_style(obj, LV_PART_ANY, LV_STATE_ANY, &style); //Remove a specific style
- * @example lv_obj_remove_style(obj, LV_PART_MAIN, LV_STATE_ANY, &style); //Remove all styles from the main part
- * @example lv_obj_remove_style(obj, LV_PART_ANY, LV_STATE_ANY, NULL); //Remove all styles
+ * @example lv_obj_remove_style(obj, &style, LV_PART_ANY | LV_STATE_ANY); //Remove a specific style
+ * @example lv_obj_remove_style(obj, NULL, LV_PART_MAIN | LV_STATE_ANY); //Remove all styles from the main part
+ * @example lv_obj_remove_style(obj, NULL, LV_PART_ANY | LV_STATE_ANY); //Remove all styles
  */
 void lv_obj_remove_style(struct _lv_obj_t * obj, lv_style_t * style, lv_style_selector_t selector);
 
diff --git a/src/extra/widgets/span/lv_span.c b/src/extra/widgets/span/lv_span.c
index d43e4f1cf..ad40baaa1 100644
--- a/src/extra/widgets/span/lv_span.c
+++ b/src/extra/widgets/span/lv_span.c
@@ -137,6 +137,7 @@ void lv_spangroup_del_span(lv_obj_t * obj, lv_span_t * span)
             if(cur_span->txt && cur_span->static_flag == 0) {
                 lv_mem_free(cur_span->txt);
             }
+            lv_style_reset(&cur_span->style);
             lv_mem_free(cur_span);
             break;
         }
@@ -501,6 +502,7 @@ static void lv_spangroup_destructor(const lv_obj_class_t * class_p, lv_obj_t * o
         if(cur_span->txt && cur_span->static_flag == 0) {
             lv_mem_free(cur_span->txt);
         }
+        lv_style_reset(&cur_span->style);
         lv_mem_free(cur_span);
         cur_span = _lv_ll_get_head(&spans->child_ll);
     }