diff --git a/components/utilities/ulog/ulog.c b/components/utilities/ulog/ulog.c
index bea6500f7ea004ec5c6a7c61d154d724ce22c56d..a878baaa12b63745e457e3f1a33cdf7c08628eba 100644
--- a/components/utilities/ulog/ulog.c
+++ b/components/utilities/ulog/ulog.c
@@ -790,6 +790,7 @@ int ulog_tag_lvl_filter_set(const char *tag, rt_uint32_t level)
         {
             /* remove current tag's level filter when input level is the lowest level */
             rt_slist_remove(&ulog.filter.tag_lvl_list, &tag_lvl->list);
+            rt_free(tag_lvl);
         }
         else
         {