diff --git a/core/rtw_mlme_ext.c b/core/rtw_mlme_ext.c
index 23107e5..1452983 100644
--- a/core/rtw_mlme_ext.c
+++ b/core/rtw_mlme_ext.c
@@ -9878,7 +9878,7 @@ int issue_deauth_ex(_adapter *padapter, u8 *da, unsigned short reason, int try_c
 			break;
 
 		if (i < try_cnt && wait_ms > 0 && ret == _FAIL)
-			rtw_msleep_os(wait_ms);
+			rtw_mdelay_os(wait_ms);
 
 	} while ((i < try_cnt) && ((ret == _FAIL) || (wait_ms == 0)));