Index: head/sys/kern/uipc_sockbuf.c
===================================================================
--- head/sys/kern/uipc_sockbuf.c
+++ head/sys/kern/uipc_sockbuf.c
@@ -1522,7 +1522,7 @@
 
 /* This takes the place of kern.maxsockbuf, which moved to kern.ipc. */
 static int dummy;
-SYSCTL_INT(_kern, KERN_DUMMY, dummy, CTLFLAG_RW, &dummy, 0, "");
+SYSCTL_INT(_kern, KERN_DUMMY, dummy, CTLFLAG_RW | CTLFLAG_SKIP, &dummy, 0, "");
 SYSCTL_OID(_kern_ipc, KIPC_MAXSOCKBUF, maxsockbuf, CTLTYPE_ULONG|CTLFLAG_RW,
     &sb_max, 0, sysctl_handle_sb_max, "LU", "Maximum socket buffer size");
 SYSCTL_ULONG(_kern_ipc, KIPC_SOCKBUF_WASTE, sockbuf_waste_factor, CTLFLAG_RW,