diff --git a/libc/kernel/uapi/linux/ipv6.h b/libc/kernel/uapi/linux/ipv6.h
index d8fe3cd..da09ced 100644
--- a/libc/kernel/uapi/linux/ipv6.h
+++ b/libc/kernel/uapi/linux/ipv6.h
@@ -151,6 +151,7 @@
   DEVCONF_IOAM6_ID_WIDE,
   DEVCONF_NDISC_EVICT_NOCARRIER,
   DEVCONF_ACCEPT_UNTRACKED_NA,
+  DEVCONF_ACCEPT_RA_MIN_LFT,
   DEVCONF_MAX
 };
 #endif