diff --git a/core/rtw_sta_mgt.c b/core/rtw_sta_mgt.c
index f8c390d..ddcd1f7 100644
--- a/core/rtw_sta_mgt.c
+++ b/core/rtw_sta_mgt.c
@@ -365,21 +365,17 @@ static void	_rtw_free_sta_recv_priv_lock(struct sta_recv_priv *psta_recvpriv)
 
 }
 
-void rtw_mfree_stainfo(struct sta_info *psta);
 void rtw_mfree_stainfo(struct sta_info *psta)
 {
 
-	if (&psta->lock != NULL)
-		_rtw_spinlock_free(&psta->lock);
+	_rtw_spinlock_free(&psta->lock);
 
 	_rtw_free_sta_xmit_priv_lock(&psta->sta_xmitpriv);
 	_rtw_free_sta_recv_priv_lock(&psta->sta_recvpriv);
 
 }
 
-
 /* this function is used to free the memory of lock || sema for all stainfos */
-void rtw_mfree_all_stainfo(struct sta_priv *pstapriv);
 void rtw_mfree_all_stainfo(struct sta_priv *pstapriv)
 {
 	_irqL	 irqL;