diff --git a/gtk2_ardour/export_range_markers_dialog.cc b/gtk2_ardour/export_range_markers_dialog.cc
index 6163cab28b..1d81f57ade 100644
--- a/gtk2_ardour/export_range_markers_dialog.cc
+++ b/gtk2_ardour/export_range_markers_dialog.cc
@@ -74,7 +74,7 @@ ExportRangeMarkersDialog::process_range_markers_export(Locations::LocationList&
 			string filepath = get_target_filepath(
 				get_selected_file_name(),
 				currentLocation->name(),
-				sndfile_file_ending_from_string(get_selected_header_format()));
+				get_selected_header_format());
 			
 			initSpec(filepath);