diff --git a/usr.sbin/sendmail/cf/cf/sun-lamp.mc b/usr.sbin/sendmail/cf/cf/sun-lamp.mc
index 11d5bc9752c1..72e99d4ed446 100644
--- a/usr.sbin/sendmail/cf/cf/sun-lamp.mc
+++ b/usr.sbin/sendmail/cf/cf/sun-lamp.mc
@@ -35,7 +35,7 @@ divert(-1)
 #
 
 include(`../m4/cf.m4')
-VERSIONID(`@(#)sun-lamp.mc	$Revision: 1.3 $')
+VERSIONID(`@(#)sun-lamp.mc	$Revision: 1.4 $')
 OSTYPE(bsd4.4)dnl
 MAILER(local)dnl
 MAILER(smtp)dnl
@@ -45,6 +45,7 @@ define(`CSNET_RELAY', mailhost.Berkeley.EDU)dnl
 define(`confCHECKPOINT_INTERVAL', 10)dnl
 define(`confAUTO_REBUILD', True)dnl
 define(`confMESSAGE_TIMEOUT', 3d/4h)dnl
+define(`confDELIVERY_MODE', queue)dnl
 Cwlamp