diff --git a/package/ctcgfw/rtl8821cu/patches/010-remove-useless-cflags.patch b/package/ctcgfw/rtl8821cu/patches/010-remove-useless-cflags.patch
index b291c12a02..8d33720aa1 100644
--- a/package/ctcgfw/rtl8821cu/patches/010-remove-useless-cflags.patch
+++ b/package/ctcgfw/rtl8821cu/patches/010-remove-useless-cflags.patch
@@ -16,4 +16,3 @@ index 6a065bf..6e1c6d0 100755
  endif
  
  ####START RASPBERRY PI SUPPORT
-
diff --git a/package/ctcgfw/rtl8821cu/patches/020-fix-build-on-4.19.patch b/package/ctcgfw/rtl8821cu/patches/020-fix-build-on-4.19.patch
new file mode 100644
index 0000000000..ccf2c4d86a
--- /dev/null
+++ b/package/ctcgfw/rtl8821cu/patches/020-fix-build-on-4.19.patch
@@ -0,0 +1,24 @@
+diff --git a/os_dep/linux/os_intfs.c b/os_dep/linux/os_intfs.c
+index 660bacf..a73a664 100644
+--- a/os_dep/linux/os_intfs.c
++++ b/os_dep/linux/os_intfs.c
+@@ -1190,6 +1190,11 @@ unsigned int rtw_classify8021d(struct sk_buff *skb)
+ }
+ 
+ 
++#if (LINUX_VERSION_CODE>=KERNEL_VERSION(4,19,0))
++static u16 rtw_select_queue(struct net_device *dev, struct sk_buff *skb,
++				struct net_device *sb_dev,
++				select_queue_fallback_t fallback)
++#else
+ static u16 rtw_select_queue(struct net_device *dev, struct sk_buff *skb
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
+ 	, void *accel_priv
+@@ -1198,6 +1203,7 @@ static u16 rtw_select_queue(struct net_device *dev, struct sk_buff *skb
+ 	#endif
+ #endif
+ )
++#endif
+ {
+ 	_adapter	*padapter = rtw_netdev_priv(dev);
+ 	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;