-SUBSYSTEM=="drm", MODE="0660", GROUP="@WESTONGROUP@", SECLABEL{smack}="*", TAG+="systemd", ENV{SYSTEMD_WANTS}="weston@@WESTONUSER@.service"
+SUBSYSTEM=="drm", MODE="0660", GROUP="@WESTONGROUP@", SECLABEL{smack}="*", TAG+="systemd", ENV{SYSTEMD_WANTS}+="weston@@WESTONUSER@.service"