diff --git a/libs/ardour/ardour/rc_configuration_vars.h b/libs/ardour/ardour/rc_configuration_vars.h
index cb0dc4ead2..00d44376bb 100644
--- a/libs/ardour/ardour/rc_configuration_vars.h
+++ b/libs/ardour/ardour/rc_configuration_vars.h
@@ -273,3 +273,4 @@ CONFIG_VARIABLE (bool, show_video_export_info, "show-video-export-info", true)
 CONFIG_VARIABLE (bool, show_video_server_dialog, "show-video-server-dialog", false)
 
 CONFIG_VARIABLE (float, export_preroll, "export-preroll", 10.0) // seconds
+CONFIG_VARIABLE (float, export_silence_threshold, "export-silence-threshold", -INFINITY) // dB
diff --git a/libs/ardour/export_graph_builder.cc b/libs/ardour/export_graph_builder.cc
index a15a48a350..d23763a567 100644
--- a/libs/ardour/export_graph_builder.cc
+++ b/libs/ardour/export_graph_builder.cc
@@ -580,7 +580,8 @@ ExportGraphBuilder::SilenceHandler::SilenceHandler (ExportGraphBuilder & parent,
 	max_frames_in = max_frames;
 	framecnt_t sample_rate = parent.session.nominal_frame_rate();
 
-	silence_trimmer.reset (new SilenceTrimmer<Sample>(max_frames_in));
+	// TODO silence-threshold should be per export-preset, with Config->get_silence_threshold being the default
+	silence_trimmer.reset (new SilenceTrimmer<Sample>(max_frames_in, Config->get_export_silence_threshold ()));
 	silence_trimmer->set_trim_beginning (config.format->trim_beginning());
 	silence_trimmer->set_trim_end (config.format->trim_end());