diff --git a/libc/kernel/uapi/linux/tipc.h b/libc/kernel/uapi/linux/tipc.h
index 1d092cc..c66754c 100644
--- a/libc/kernel/uapi/linux/tipc.h
+++ b/libc/kernel/uapi/linux/tipc.h
@@ -146,6 +146,7 @@
 #define TIPC_AEAD_KEYLEN_MIN (16 + 4)
 #define TIPC_AEAD_KEYLEN_MAX (32 + 4)
 #define TIPC_AEAD_KEY_SIZE_MAX (sizeof(struct tipc_aead_key) + TIPC_AEAD_KEYLEN_MAX)
+#define TIPC_REKEYING_NOW (~0U)
 #define TIPC_CFG_SRV 0
 #define TIPC_ZONE_SCOPE 1
 #define TIPC_ADDR_NAMESEQ 1