diff --git a/libc/kernel/uapi/linux/lwtunnel.h b/libc/kernel/uapi/linux/lwtunnel.h
index f1e2ab8..f472150 100644
--- a/libc/kernel/uapi/linux/lwtunnel.h
+++ b/libc/kernel/uapi/linux/lwtunnel.h
@@ -28,6 +28,7 @@
   LWTUNNEL_ENCAP_SEG6,
   LWTUNNEL_ENCAP_BPF,
   LWTUNNEL_ENCAP_SEG6_LOCAL,
+  LWTUNNEL_ENCAP_RPL,
   __LWTUNNEL_ENCAP_MAX,
 };
 #define LWTUNNEL_ENCAP_MAX (__LWTUNNEL_ENCAP_MAX - 1)