Index: etc/rc.d/ddb
===================================================================
--- etc/rc.d/ddb	(revision 248604)
+++ etc/rc.d/ddb	(working copy)
@@ -19,8 +19,11 @@ stop_cmd=":"
 ddb_prestart()
 {
 	# Silently exit if ddb is not enabled
-	if [ -z "`sysctl -Nq debug.ddb.scripting.scripts`" ]; then
-		return 1
+	# NOTE: exit is needed here, not return, else rc.subr emits
+	# a "failed precmd routine" warning when ddb_enable="yes" is
+	# used on a system which lacks DDB support in the kernel.
+	if [ -z "`$SYSCTL_N -q debug.ddb.scripting.scripts`" ]; then
+		exit 1
 	fi
 }