diff --git a/src/lv_core/lv_group.h b/src/lv_core/lv_group.h
index f5fb9e4fb..3b1ed4f4a 100644
--- a/src/lv_core/lv_group.h
+++ b/src/lv_core/lv_group.h
@@ -183,14 +183,6 @@ void lv_group_set_click_focus(lv_group_t * group, bool en);
  */
 void lv_group_set_wrap(lv_group_t * group, bool en);
 
-/**
- * Modify a style with the set 'style_mod' function. The input style remains unchanged.
- * @param group pointer to group
- * @param style pointer to a style to modify
- * @return a copy of the input style but modified with the 'style_mod' function
- */
-lv_style_t * lv_group_mod_style(lv_group_t * group, const lv_style_t * style);
-
 /**
  * Get the focused object or NULL if there isn't one
  * @param group pointer to a group