Index: head/share/man/man4/lmc.4
===================================================================
--- head/share/man/man4/lmc.4
+++ head/share/man/man4/lmc.4
@@ -43,7 +43,7 @@
 .\" this program; if not, write to the Free Software Foundation, Inc., 59
 .\" Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 .\"
-.Dd February 8, 2012
+.Dd April 24, 2018
 .Dt LMC 4
 .Os
 .\"
@@ -88,6 +88,13 @@
 Netgraph and SPPP can both be enabled; Netgraph will be used if the
 .Va rawdata
 hook is connected.
+.\"
+.Sh DEPRECATION NOTICE
+The
+.Nm
+driver is not present in
+.Fx 12.0
+and later.
 .\"
 .Sh DESCRIPTION
 .\"
Index: head/sys/dev/lmc/if_lmc.c
===================================================================
--- head/sys/dev/lmc/if_lmc.c
+++ head/sys/dev/lmc/if_lmc.c
@@ -4547,6 +4547,7 @@
 
   /* Start the card and attach a kernel interface and line protocol. */
   if ((error = attach_card(sc, ""))) detach_card(sc);
+  gone_in_dev(dev, 12, "lmc(4) driver");
   return error;
   }