diff --git a/libc/kernel/uapi/linux/lwtunnel.h b/libc/kernel/uapi/linux/lwtunnel.h
index f472150..e6fb536 100644
--- a/libc/kernel/uapi/linux/lwtunnel.h
+++ b/libc/kernel/uapi/linux/lwtunnel.h
@@ -29,6 +29,7 @@
   LWTUNNEL_ENCAP_BPF,
   LWTUNNEL_ENCAP_SEG6_LOCAL,
   LWTUNNEL_ENCAP_RPL,
+  LWTUNNEL_ENCAP_IOAM6,
   __LWTUNNEL_ENCAP_MAX,
 };
 #define LWTUNNEL_ENCAP_MAX (__LWTUNNEL_ENCAP_MAX - 1)