diff --git a/kernel/core/include/tos_priority_mail_queue.h b/kernel/core/include/tos_priority_mail_queue.h
index 7ca52fce..d56ac0d5 100644
--- a/kernel/core/include/tos_priority_mail_queue.h
+++ b/kernel/core/include/tos_priority_mail_queue.h
@@ -67,7 +67,6 @@ __API__ k_err_t tos_prio_mail_q_destroy(k_prio_mail_q_t *prio_mail_q);
  * @attention a MAIL is a buffer with a certain size.
  *
  * @param[in]   prio_mail_q pointer to the handler of the priority mail queue.
- * @param[in]   pool        pool buffer of the priority mail queue.
  * @param[in]   mail_cnt    mail count of the priority mail queue.
  * @param[in]   mail_size   size of each mail in the priority mail queue.
  *