diff --git a/gtk2_ardour/editor_timefx.cc b/gtk2_ardour/editor_timefx.cc
index 2f8adb8575..37678343cf 100644
--- a/gtk2_ardour/editor_timefx.cc
+++ b/gtk2_ardour/editor_timefx.cc
@@ -187,7 +187,7 @@ Editor::time_fx (RegionList& regions, Temporal::ratio_t ratio, bool pitching)
 	current_timefx->request.time_fraction = current_timefx->get_time_fraction ();
 	current_timefx->request.pitch_fraction = current_timefx->get_pitch_fraction ();
 
-	if (current_timefx->request.time_fraction == 1.0 &&
+	if (current_timefx->request.time_fraction.to_double() == 1.0 &&
 	    current_timefx->request.pitch_fraction == 1.0) {
 		/* nothing to do */
 		current_timefx->hide ();
@@ -269,7 +269,7 @@ Editor::time_fx (RegionList& regions, Temporal::ratio_t ratio, bool pitching)
 			transients = NoTransients;
 			precise = true;
 			preserve_formants = false;
-			current_timefx->request.pitch_fraction = 1.0 / current_timefx->request.time_fraction;
+			current_timefx->request.pitch_fraction = 1.0 / current_timefx->request.time_fraction.to_double();
 			shortwin = true;
 			// peaklock = false;
 			break;
diff --git a/gtk2_ardour/time_fx_dialog.cc b/gtk2_ardour/time_fx_dialog.cc
index 6f25ad2c6b..c313cbe729 100644
--- a/gtk2_ardour/time_fx_dialog.cc
+++ b/gtk2_ardour/time_fx_dialog.cc
@@ -158,7 +158,7 @@ TimeFXDialog::TimeFXDialog (Editor& e, bool pitch, timecnt_t const & oldlen, tim
 		table->attach (*clock_align, 1, 2, row, row+1, Gtk::AttachOptions (Gtk::EXPAND|Gtk::FILL), Gtk::FILL, 0, 0);
 		row++;
 
-		const double fract = (double) (new_length / original_length);
+		const double fract = (new_length / original_length).to_double();
 		/* note the *100.0 to convert fract into a percentage */
 		duration_adjustment.set_value (fract*100.0);
 		Gtk::SpinButton* spinner = manage (new Gtk::SpinButton (duration_adjustment, 1.0, 3));
@@ -313,5 +313,5 @@ TimeFXDialog::duration_clock_changed ()
 
 	PBD::Unwinder<bool> uw (ignore_adjustment_change, true);
 
-	duration_adjustment.set_value (100.0 * (double) (duration_clock->current_duration() / original_length));
+	duration_adjustment.set_value (100.0 * (duration_clock->current_duration() / original_length).to_double());
 }