diff --git a/os_dep/linux/ioctl_cfg80211.c b/os_dep/linux/ioctl_cfg80211.c
index 759b38d..99ac279 100644
--- a/os_dep/linux/ioctl_cfg80211.c
+++ b/os_dep/linux/ioctl_cfg80211.c
@@ -749,7 +749,7 @@ check_bss:
 		struct ieee80211_channel *notify_channel;
 		u32 freq;
 		u16 channel = cur_network->network.Configuration.DSConfig;
-		#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0))
+		#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0))
 		struct cfg80211_roam_info roam_info = {};
 		#endif
 
@@ -758,7 +758,7 @@ check_bss:
 		#endif
 
 		RTW_INFO(FUNC_ADPT_FMT" call cfg80211_roamed\n", FUNC_ADPT_ARG(padapter));
-		#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0))
+		#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0))
 		roam_info.channel = notify_channel;
 		roam_info.bssid = cur_network->network.MacAddress;
 		roam_info.req_ie =
@@ -3670,6 +3670,11 @@ static int rtw_cfg80211_add_monitor_if(_adapter *padapter, char *name, struct ne
 	mon_ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 	strncpy(mon_ndev->name, name, IFNAMSIZ);
 	mon_ndev->name[IFNAMSIZ - 1] = 0;
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12 ,0))
+	mon_ndev->needs_free_netdev = true;
+#else
+	mon_ndev->destructor = rtw_ndev_destructor;
+#endif
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 9))
 	mon_ndev->needs_free_netdev = false;
 	mon_ndev->priv_destructor = rtw_ndev_destructor;
@@ -6446,7 +6451,7 @@ static void rtw_cfg80211_preinit_wiphy(_adapter *adapter, struct wiphy *wiphy)
 #endif
 
 #if defined(CONFIG_PM) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 0))
-	#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,12,0))
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 12 ,0))
 	wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 	#else // kernel >= 4.12
 	wiphy->max_sched_scan_reqs = 1;