diff --git a/package/kernel/rtl8188eu/Makefile b/package/kernel/rtl8188eu/Makefile
index 06ba809318..35089caa54 100644
--- a/package/kernel/rtl8188eu/Makefile
+++ b/package/kernel/rtl8188eu/Makefile
@@ -29,6 +29,7 @@ define KernelPackage/rtl8188eu
 endef
 
 NOSTDINC_FLAGS:= \
+	$(KERNEL_NOSTDINC_FLAGS) \
 	-I$(PKG_BUILD_DIR) \
 	-I$(PKG_BUILD_DIR)/include \
 	-I$(PKG_BUILD_DIR)/platform \
diff --git a/package/kernel/rtl8189es/Makefile b/package/kernel/rtl8189es/Makefile
index 6fd3e1884a..80192c05fe 100644
--- a/package/kernel/rtl8189es/Makefile
+++ b/package/kernel/rtl8189es/Makefile
@@ -30,6 +30,7 @@ define KernelPackage/rtl8189es
 endef
 
 NOSTDINC_FLAGS:= \
+	$(KERNEL_NOSTDINC_FLAGS) \
 	-I$(PKG_BUILD_DIR) \
 	-I$(PKG_BUILD_DIR)/include \
 	-I$(STAGING_DIR)/usr/include/mac80211-backport \
diff --git a/package/kernel/rtl8192eu/Makefile b/package/kernel/rtl8192eu/Makefile
index e386ba1018..b9475d2c40 100644
--- a/package/kernel/rtl8192eu/Makefile
+++ b/package/kernel/rtl8192eu/Makefile
@@ -29,6 +29,7 @@ define KernelPackage/rtl8192eu
 endef
 
 NOSTDINC_FLAGS:= \
+	$(KERNEL_NOSTDINC_FLAGS) \
 	-I$(PKG_BUILD_DIR) \
 	-I$(PKG_BUILD_DIR)/include \
 	-I$(STAGING_DIR)/usr/include/mac80211-backport \
diff --git a/package/kernel/rtl8812au-ac/Makefile b/package/kernel/rtl8812au-ac/Makefile
index 07a15ec006..7a15e1a479 100644
--- a/package/kernel/rtl8812au-ac/Makefile
+++ b/package/kernel/rtl8812au-ac/Makefile
@@ -37,6 +37,7 @@ define KernelPackage/rtl8812au-ac
 endef
 
 NOSTDINC_FLAGS:= \
+	$(KERNEL_NOSTDINC_FLAGS) \
 	-I$(PKG_BUILD_DIR) \
 	-I$(PKG_BUILD_DIR)/include \
 	-I$(STAGING_DIR)/usr/include/mac80211-backport \
diff --git a/package/kernel/rtl8821cu/Makefile b/package/kernel/rtl8821cu/Makefile
index 68d5de36c5..ba986129e0 100644
--- a/package/kernel/rtl8821cu/Makefile
+++ b/package/kernel/rtl8821cu/Makefile
@@ -1,10 +1,6 @@
+# SDPX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2021 ImmortalWrt
-# <https://immortalwrt.org>
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2021-2022 ImmortalWrt.org
 
 include $(TOPDIR)/rules.mk
 
@@ -17,9 +13,8 @@ PKG_SOURCE_DATE:=2022-04-09
 PKG_SOURCE_VERSION:=8c2226a74ae718439d56248bd2e44ccf717086d5
 PKG_MIRROR_HASH:=3353a3bc4c73652eceaab95809aab27c3ae8bbf7e915b73488361a061ba91b84
 
-PKG_LICENSE:=GPL-2.0
+PKG_LICENSE:=GPL-2.0-only
 PKG_LICENSE_FILES:=LICENSE
-PKG_MAINTAINTER:=CN_SZTL <cnsztl@immortalwrt.org>
 
 PKG_BUILD_PARALLEL:=1
 
@@ -37,7 +32,8 @@ define KernelPackage/rtl8821cu
   PROVIDES:=kmod-rtl8821cu
 endef
 
-NOSTDINC_FLAGS = \
+NOSTDINC_FLAGS:= \
+	$(KERNEL_NOSTDINC_FLAGS) \
 	-I$(PKG_BUILD_DIR) \
 	-I$(PKG_BUILD_DIR)/include \
 	-I$(STAGING_DIR)/usr/include/mac80211-backport \
@@ -47,15 +43,7 @@ NOSTDINC_FLAGS = \
 	-include backport/autoconf.h \
 	-include backport/backport.h
 
-EXTRA_KCONFIG:= \
-	CONFIG_RTL8821CU=m \
-	USER_MODULE_NAME=rtl8821cu
-
-ifeq ($(ARCH),aarch64)
-	EXTRA_KCONFIG += CONFIG_MP_VHT_HW_TX_MODE=n
-endif
-
-EXTRA_CFLAGS:= \
+NOSTDINC_FLAGS+= \
 	-DRTW_SINGLE_WIPHY \
 	-DRTW_USE_CFG80211_STA_EVENT \
 	-DCONFIG_IOCTL_CFG80211 \
@@ -63,19 +51,16 @@ EXTRA_CFLAGS:= \
 	-DBUILD_OPENWRT
 
 ifeq ($(BOARD),x86)
-	EXTRA_CFLAGS += -mhard-float
+  NOSTDINC_FLAGS+= -mhard-float
 endif
 
-MAKE_OPTS:= \
-	$(KERNEL_MAKE_FLAGS) \
-	M="$(PKG_BUILD_DIR)" \
-	NOSTDINC_FLAGS="$(NOSTDINC_FLAGS)" \
-	USER_EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \
-	$(EXTRA_KCONFIG)
-
 define Build/Compile
-	+$(MAKE) $(PKG_JOBS) -C "$(LINUX_DIR)" \
-		$(MAKE_OPTS) \
+	+$(KERNEL_MAKE) $(PKG_JOBS) \
+		M="$(PKG_BUILD_DIR)" \
+		NOSTDINC_FLAGS="$(NOSTDINC_FLAGS)" \
+		CONFIG_RTL8821CU=m \
+		$(if $(CONFIG_aarch64),CONFIG_MP_VHT_HW_TX_MODE=n) \
+		USER_MODULE_NAME=rtl8821cu \
 		modules
 endef