Index: dbus-1.12.2/bus/dbus.service.in
===================================================================
--- dbus-1.12.2.orig/bus/dbus.service.in
+++ dbus-1.12.2/bus/dbus.service.in
@@ -2,6 +2,8 @@
 Description=D-Bus System Message Bus
 Documentation=man:dbus-daemon(1)
 Requires=dbus.socket
+RefuseManualStart=true
+RefuseManualStop=true
 
 [Service]
 ExecStart=@EXPANDED_BINDIR@/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation --syslog-only