diff --git a/dkms.conf b/dkms.conf
index 3510a97..1d70c91 100644
--- a/dkms.conf
+++ b/dkms.conf
@@ -1,5 +1,5 @@
 PACKAGE_NAME="realtek-rtl88xxau"
-PACKAGE_VERSION="5.3.4~20190216"
+PACKAGE_VERSION="5.3.4~20190406"
 CLEAN="'make' clean"
 BUILT_MODULE_NAME[0]=88XXau
 PROCS_NUM=`nproc`
diff --git a/os_dep/linux/ioctl_cfg80211.c b/os_dep/linux/ioctl_cfg80211.c
index 1a1c213..ab36de7 100644
--- a/os_dep/linux/ioctl_cfg80211.c
+++ b/os_dep/linux/ioctl_cfg80211.c
@@ -4638,7 +4638,11 @@ static int cfg80211_rtw_del_virtual_intf(struct wiphy *wiphy,
 		pwdev_priv = adapter_wdev_data(adapter);
 
 		if (ndev == pwdev_priv->pmon_ndev) {
-			unregister_netdevice(ndev);
+	/* unregister only monitor device
+	 * because only monitor can be added
+	 */
+	if(wdev->iftype == NL80211_IFTYPE_MONITOR)
+		unregister_netdevice(ndev);
 			pwdev_priv->pmon_ndev = NULL;
 			pwdev_priv->ifname_mon[0] = '\0';
 			RTW_INFO(FUNC_NDEV_FMT" remove monitor ndev\n", FUNC_NDEV_ARG(ndev));