diff --git a/libs/ardour/ardour/session_configuration_vars.h b/libs/ardour/ardour/session_configuration_vars.h
index ac9c294661..5330932b26 100644
--- a/libs/ardour/ardour/session_configuration_vars.h
+++ b/libs/ardour/ardour/session_configuration_vars.h
@@ -41,7 +41,7 @@ CONFIG_VARIABLE (bool, end_marker_is_free, "end-marker-is-free", true)
 CONFIG_VARIABLE (LayerModel, layer_model, "layer-model", MoveAddHigher)
 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, timecode_source_is_synced, "timecode-source-is-synced", false)
+CONFIG_VARIABLE (bool, timecode_source_is_synced, "timecode-source-is-synced", true)
 CONFIG_VARIABLE (bool, jack_time_master, "jack-time-master", true)
 CONFIG_VARIABLE (bool, use_video_sync, "use-video-sync", false)
 CONFIG_VARIABLE (float, video_pullup, "video-pullup", 0.0f)