--- linux-4.9.37/net/ipv4/proc.c	2017-07-12 16:42:41.000000000 +0300
+++ linux-4.9.y/net/ipv4/proc.c	2021-06-07 13:01:34.000000000 +0300
@@ -305,6 +305,7 @@
 	SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
 	SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
 	SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
+	SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG),
 	SNMP_MIB_SENTINEL
 };