diff --git a/libs/ardour/ardour/rc_configuration_vars.h b/libs/ardour/ardour/rc_configuration_vars.h
index 174cae9bec..2ac0156ea7 100644
--- a/libs/ardour/ardour/rc_configuration_vars.h
+++ b/libs/ardour/ardour/rc_configuration_vars.h
@@ -238,7 +238,8 @@ CONFIG_VARIABLE (bool, verbose_plugin_scan, "verbose-plugin-scan", true)
 CONFIG_VARIABLE (int, vst_scan_timeout, "vst-scan-timeout", 600) /* deciseconds, per plugin, <= 0 no timeout */
 CONFIG_VARIABLE (bool, discover_audio_units, "discover-audio-units", false)
 CONFIG_VARIABLE (bool, open_gui_after_adding_plugin, "open-gui-after-adding-plugin", true)
-CONFIG_VARIABLE (bool, show_inline_display_by_default, "show-inline-display-by-default,", true)
+CONFIG_VARIABLE (bool, show_inline_display_by_default, "show-inline-display-by-default", true)
+CONFIG_VARIABLE (bool, prefer_inline_over_gui, "prefer-inline-over-gui", true)
 
 /* custom user plugin paths */
 CONFIG_VARIABLE (std::string, plugin_path_vst, "plugin-path-vst", "@default@")