diff --git a/gtk2_ardour/export_dialog.cc b/gtk2_ardour/export_dialog.cc
index a64acd1680..8916806a15 100644
--- a/gtk2_ardour/export_dialog.cc
+++ b/gtk2_ardour/export_dialog.cc
@@ -328,7 +328,7 @@ ExportDialog::show_progress ()
 		if (gtk_events_pending()) {
 			gtk_main_iteration ();
 		} else {
-			usleep (10000);
+			Glib::usleep (10000);
 		}
 	}