diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index ebfe125..5b5f434 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -641,6 +641,7 @@
 	NET_SCTP_ADDIP_ENABLE		 = 13,
 	NET_SCTP_PRSCTP_ENABLE		 = 14,
 	NET_SCTP_SNDBUF_POLICY		 = 15,
+	NET_SCTP_SACK_TIMEOUT		 = 16,
 };
 
 /* /proc/sys/net/bridge */