diff --git a/gtk2_ardour/midi_region_view.cc b/gtk2_ardour/midi_region_view.cc
index dbf48a00df..bd83579c42 100644
--- a/gtk2_ardour/midi_region_view.cc
+++ b/gtk2_ardour/midi_region_view.cc
@@ -718,3 +718,25 @@ MidiRegionView::hide_region_editor ()
 	delete _editor;
 	_editor = nullptr;
 }
+
+void
+MidiRegionView::trim_front_starting ()
+{
+	/* We used to eparent the note group to the region view's parent, so that it didn't change.
+	   now we update it.
+	*/
+}
+
+void
+MidiRegionView::trim_front_ending ()
+{
+	if (!_midi_region) {
+		return;
+	}
+
+	if (_midi_region->start().is_negative()) {
+		/* Trim drag made start time -ve; fix this */
+		midi_region()->fix_negative_start (_editing_context.history());
+	}
+}
+
diff --git a/gtk2_ardour/midi_region_view.h b/gtk2_ardour/midi_region_view.h
index 4d2d0b26e4..9c5af44d1c 100644
--- a/gtk2_ardour/midi_region_view.h
+++ b/gtk2_ardour/midi_region_view.h
@@ -138,6 +138,9 @@ public:
 	void show_region_editor ();
 	void hide_region_editor ();
 
+	void trim_front_starting ();
+	void trim_front_ending ();
+
   protected:
 	void reset_width_dependent_items (double pixel_width);
 	void parameter_changed (std::string const & p);
diff --git a/gtk2_ardour/midi_view.cc b/gtk2_ardour/midi_view.cc
index 34af8a6b5d..c81b60e9a7 100644
--- a/gtk2_ardour/midi_view.cc
+++ b/gtk2_ardour/midi_view.cc
@@ -4785,27 +4785,6 @@ MidiView::data_recorded (std::weak_ptr<MidiSource> w)
 	_midi_context.record_layer_check (_midi_region, back);
 }
 
-void
-MidiView::trim_front_starting ()
-{
-	/* We used to eparent the note group to the region view's parent, so that it didn't change.
-	   now we update it.
-	*/
-}
-
-void
-MidiView::trim_front_ending ()
-{
-	if (!_midi_region) {
-		return;
-	}
-
-	if (_midi_region->start().is_negative()) {
-		/* Trim drag made start time -ve; fix this */
-		midi_region()->fix_negative_start ();
-	}
-}
-
 void
 MidiView::edit_patch_change (PatchChange* pc)
 {
diff --git a/gtk2_ardour/midi_view.h b/gtk2_ardour/midi_view.h
index 701900d107..ba89c5108a 100644
--- a/gtk2_ardour/midi_view.h
+++ b/gtk2_ardour/midi_view.h
@@ -338,9 +338,6 @@ class MidiView : public virtual sigc::trackable, public LineMerger
 	void set_channel_selector_scoped_note(NoteBase* note){ _channel_selection_scoped_note = note; }
 	NoteBase* channel_selector_scoped_note(){  return _channel_selection_scoped_note; }
 
-	void trim_front_starting ();
-	void trim_front_ending ();
-
 	/** Add a note to the model, and the view, at a canvas (click) coordinate.
 	 * \param t time in samples relative to the position of the region
 	 * \param y vertical position in pixels