diff --git a/gtk2_ardour/editor.h b/gtk2_ardour/editor.h
index 0159476d72..47021c552b 100644
--- a/gtk2_ardour/editor.h
+++ b/gtk2_ardour/editor.h
@@ -1448,7 +1448,7 @@ class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARD
 
 	Gtk::Allocation _canvas_viewport_allocation;
 	void track_canvas_viewport_allocate (Gtk::Allocation alloc);
-	bool track_canvas_viewport_size_allocated ();
+	void track_canvas_viewport_size_allocated ();
 	bool track_canvas_drag_motion (Glib::RefPtr<Gdk::DragContext> const &, int, int, guint);
 	bool track_canvas_key_press (GdkEventKey *);
 	bool track_canvas_key_release (GdkEventKey *);
diff --git a/gtk2_ardour/editor_canvas.cc b/gtk2_ardour/editor_canvas.cc
index d4d5f88c52..b2736feaba 100644
--- a/gtk2_ardour/editor_canvas.cc
+++ b/gtk2_ardour/editor_canvas.cc
@@ -255,10 +255,10 @@ void
 Editor::track_canvas_viewport_allocate (Gtk::Allocation alloc)
 {
 	_canvas_viewport_allocation = alloc;
-	(void) track_canvas_viewport_size_allocated ();
+	track_canvas_viewport_size_allocated ();
 }
 
-bool
+void
 Editor::track_canvas_viewport_size_allocated ()
 {
 	bool height_changed = _visible_canvas_height != _canvas_viewport_allocation.get_height();
@@ -289,8 +289,6 @@ Editor::track_canvas_viewport_size_allocated ()
 	update_fixed_rulers();
 	redisplay_tempo (false);
 	_summary->set_overlays_dirty ();
-
-	return false;
 }
 
 void