diff --git a/libc/kernel/uapi/linux/netlink.h b/libc/kernel/uapi/linux/netlink.h
index 4f35c02..4c0fd1f 100644
--- a/libc/kernel/uapi/linux/netlink.h
+++ b/libc/kernel/uapi/linux/netlink.h
@@ -112,6 +112,7 @@
 #define NETLINK_LIST_MEMBERSHIPS 9
 #define NETLINK_CAP_ACK 10
 #define NETLINK_EXT_ACK 11
+#define NETLINK_GET_STRICT_CHK 12
 struct nl_pktinfo {
   __u32 group;
 };