diff --git a/libexec/rc/rc.d/kdc b/libexec/rc/rc.d/kdc
--- a/libexec/rc/rc.d/kdc
+++ b/libexec/rc/rc.d/kdc
@@ -12,17 +12,15 @@
 name=kdc
 desc="Kerberos 5 server"
 rcvar=${name}_enable
-start_precmd=${name}_start_precmd
 
 set_rcvar_obsolete kerberos5_server_enable kdc_enable
 set_rcvar_obsolete kerberos5_server kdc_program
 set_rcvar_obsolete kerberos5_server_flags kdc_flags
 
-kdc_start_precmd()
-{
-
-	command_args="$command_args --detach"
-}
 
 load_rc_config $name
+if [ "${kdc_program}" = /usr/libexec/kdc -o \
+     "${kdc_program}" = /usr/local/libexec/kdc ]; then
+	command_args="$command_args --detach"
+fi
 run_rc_command "$1"