diff --git a/libc/kernel/uapi/linux/l2tp.h b/libc/kernel/uapi/linux/l2tp.h
index 818cda4..0bc4dd3 100644
--- a/libc/kernel/uapi/linux/l2tp.h
+++ b/libc/kernel/uapi/linux/l2tp.h
@@ -106,54 +106,56 @@
  L2TP_ATTR_IP6_SADDR,
  L2TP_ATTR_IP6_DADDR,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_UDP_ZERO_CSUM6_TX,
+ L2TP_ATTR_UDP_ZERO_CSUM6_RX,
  __L2TP_ATTR_MAX,
 };
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define L2TP_ATTR_MAX (__L2TP_ATTR_MAX - 1)
 enum {
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_ATTR_STATS_NONE,
  L2TP_ATTR_TX_PACKETS,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_ATTR_TX_BYTES,
  L2TP_ATTR_TX_ERRORS,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_ATTR_RX_PACKETS,
  L2TP_ATTR_RX_BYTES,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_ATTR_RX_SEQ_DISCARDS,
  L2TP_ATTR_RX_OOS_PACKETS,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_ATTR_RX_ERRORS,
  __L2TP_ATTR_STATS_MAX,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 #define L2TP_ATTR_STATS_MAX (__L2TP_ATTR_STATS_MAX - 1)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 enum l2tp_pwtype {
  L2TP_PWTYPE_NONE = 0x0000,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_PWTYPE_ETH_VLAN = 0x0004,
  L2TP_PWTYPE_ETH = 0x0005,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_PWTYPE_PPP = 0x0007,
  L2TP_PWTYPE_PPP_AC = 0x0008,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_PWTYPE_IP = 0x000b,
  __L2TP_PWTYPE_MAX
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 enum l2tp_l2spec_type {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_L2SPECTYPE_NONE,
  L2TP_L2SPECTYPE_DEFAULT,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 enum l2tp_encap_type {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_ENCAPTYPE_UDP,
  L2TP_ENCAPTYPE_IP,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 enum l2tp_seqmode {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_SEQ_NONE = 0,
  L2TP_SEQ_IP = 1,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  L2TP_SEQ_ALL = 2,
 };
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define L2TP_GENL_NAME "l2tp"
 #define L2TP_GENL_VERSION 0x1
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif