diff --git a/libs/ardour/ardour/rc_configuration_vars.h b/libs/ardour/ardour/rc_configuration_vars.h
index ac7005353b..daa975a74b 100644
--- a/libs/ardour/ardour/rc_configuration_vars.h
+++ b/libs/ardour/ardour/rc_configuration_vars.h
@@ -199,6 +199,7 @@ CONFIG_VARIABLE (MeterType, meter_type_bus, "meter-type-bus", MeterPeak)
 
 /* miscellany */
 
+CONFIG_VARIABLE (bool, try_autostart_engine, "try-autostart-engine,", false)
 CONFIG_VARIABLE (std::string, auditioner_output_left, "auditioner-output-left", "default")
 CONFIG_VARIABLE (std::string, auditioner_output_right, "auditioner-output-right", "default")
 CONFIG_VARIABLE (bool, replicate_missing_region_channels, "replicate-missing-region-channels", false)