diff --git a/include/linux/snmp.h b/include/linux/snmp.h
index 4435d10..d2a9aa3 100644
--- a/include/linux/snmp.h
+++ b/include/linux/snmp.h
@@ -227,6 +227,7 @@
 	LINUX_MIB_SACKSHIFTFALLBACK,
 	LINUX_MIB_TCPBACKLOGDROP,
 	LINUX_MIB_TCPMINTTLDROP, /* RFC 5082 */
+	LINUX_MIB_TCPDEFERACCEPTDROP,
 	__LINUX_MIB_MAX
 };