diff --git a/gtk2_ardour/ardour3_ui_dark.rc.in b/gtk2_ardour/ardour3_ui_dark.rc.in
index 7840ac7007..a945cd8240 100644
--- a/gtk2_ardour/ardour3_ui_dark.rc.in
+++ b/gtk2_ardour/ardour3_ui_dark.rc.in
@@ -352,6 +352,12 @@ style "solo_button_active" = "small_button"
 	fg[PRELIGHT] = { 0, 0, 0 }
 }
 
+style "mixer_invert_button" = "small_button"
+{
+	bg[ACTIVE] = { 1.0, 0.749, 0.247 }
+	fg[ACTIVE] = { 0, 0, 0 }
+}
+
 style "mixer_solo_button" = "solo_button"
 {
 	font_name = "@FONT_SMALLER@"
@@ -1430,8 +1436,8 @@ widget "*MixerSoloButton-active" style:highest "mixer_solo_button_active"
 widget "*TrackLoopButton*" style:highest "track_loop_button"
 widget "*PanAutomationLineSelector*" style:highest "multiline_combo"
 widget "*EditorTimeButton*" style:highest "time_button"
-widget "*MixerPhaseInvertButton*" style:highest "very_small_button"
-widget "*MixerPhaseInvertButton.*" style:highest "very_small_button"
+widget "*MixerInvertButton*" style:highest "mixer_invert_button"
+widget "*MixerInvertButton.*" style:highest "mixer_invert_button"
 widget "*MixerAutomationRecordingButton*" style:highest "very_small_button"
 widget "*MixerAutomationRecordingButton.*" style:highest "very_small_button"
 widget "*MixerAutomationModeButton*" style:highest "very_small_button"
diff --git a/gtk2_ardour/mixer_strip.cc b/gtk2_ardour/mixer_strip.cc
index b7d0536ce1..abfa792f4b 100644
--- a/gtk2_ardour/mixer_strip.cc
+++ b/gtk2_ardour/mixer_strip.cc
@@ -84,7 +84,7 @@ MixerStrip::MixerStrip (Mixer_UI& mx, Session* sess, bool in_mixer)
 	, panners (sess)
 	, _mono_button (_("Mono"))
 	, button_table (3, 2)
-	, middle_button_table (1, 2)
+	, middle_button_table (2, 2)
 	, bottom_button_table (1, 2)
 	, meter_point_label (_("pre"))
 	, comment_button (_("Comments"))
@@ -183,6 +183,7 @@ MixerStrip::init ()
 
 	mute_button->set_name ("MixerMuteButton");
 	solo_button->set_name ("MixerSoloButton");
+        invert_button->set_name ("MixerInvertButton");
 
 	button_table.set_homogeneous (true);
 	button_table.set_spacings (0);
@@ -194,6 +195,7 @@ MixerStrip::init ()
 	middle_button_table.set_spacings (0);
 	middle_button_table.attach (*mute_button, 0, 1, 0, 1);
         middle_button_table.attach (*solo_button, 1, 2, 0, 1);
+        middle_button_table.attach (*invert_button, 0, 2, 1, 2);
 
 	bottom_button_table.set_col_spacings (0);
 	bottom_button_table.set_homogeneous (true);
@@ -1727,7 +1729,9 @@ MixerStrip::revert_to_default_display ()
 void
 MixerStrip::set_button_names ()
 {
-	switch (_width) {
+        invert_button_label.set_text (X_("Ø"));
+
+        switch (_width) {
 	case Wide:
 		rec_enable_button_label.set_text (_("Rec"));
 		mute_button_label.set_text (_("Mute"));
diff --git a/gtk2_ardour/route_ui.cc b/gtk2_ardour/route_ui.cc
index f5bf2f9208..60fead1e21 100644
--- a/gtk2_ardour/route_ui.cc
+++ b/gtk2_ardour/route_ui.cc
@@ -108,6 +108,13 @@ RouteUI::init ()
 	multiple_mute_change = false;
 	multiple_solo_change = false;
 
+	invert_button = manage (new BindableToggleButton ());
+	// mute_button->set_self_managed (true);
+	invert_button->set_name ("InvertButton");
+	invert_button->add (invert_button_label);
+	invert_button_label.show ();
+	UI::instance()->set_tip (invert_button, _("Invert (Phase reverse) this track"), "");
+
 	mute_button = manage (new BindableToggleButton ());
 	// mute_button->set_self_managed (true);
 	mute_button->set_name ("MuteButton");
@@ -151,6 +158,9 @@ RouteUI::init ()
 	solo_button->signal_button_release_event().connect (sigc::mem_fun(*this, &RouteUI::solo_release), false);
 	mute_button->signal_button_press_event().connect (sigc::mem_fun(*this, &RouteUI::mute_press), false);
 	mute_button->signal_button_release_event().connect (sigc::mem_fun(*this, &RouteUI::mute_release), false);
+	invert_button->signal_button_press_event().connect (sigc::mem_fun(*this, &RouteUI::invert_press), false);
+	invert_button->signal_button_release_event().connect (sigc::mem_fun(*this, &RouteUI::invert_release), false);
+
 }
 
 void
@@ -222,6 +232,7 @@ RouteUI::set_route (boost::shared_ptr<Route> rp)
 	solo_button->unset_flags (Gtk::CAN_FOCUS);
 
 	mute_button->show();
+        invert_button->show ();
 
 	if (_route->is_monitor()) {
 		solo_button->hide ();
@@ -237,6 +248,18 @@ RouteUI::set_route (boost::shared_ptr<Route> rp)
 	map_frozen ();
 }
 
+bool
+RouteUI::invert_press (GdkEventButton* ev)
+{
+        return false;
+}
+
+bool
+RouteUI::invert_release (GdkEventButton* ev)
+{
+        return false;
+}
+
 bool
 RouteUI::mute_press (GdkEventButton* ev)
 {
diff --git a/gtk2_ardour/route_ui.h b/gtk2_ardour/route_ui.h
index 458910bd69..66d2629634 100644
--- a/gtk2_ardour/route_ui.h
+++ b/gtk2_ardour/route_ui.h
@@ -85,6 +85,7 @@ class RouteUI : public virtual AxisView
 	bool multiple_mute_change;
 	bool multiple_solo_change;
 
+	BindableToggleButton* invert_button;
 	BindableToggleButton* mute_button;
 	BindableToggleButton* solo_button;
 	BindableToggleButton* rec_enable_button; /* audio tracks */
@@ -92,6 +93,7 @@ class RouteUI : public virtual AxisView
 
 	Gtk::Label solo_button_label;
 	Gtk::Label mute_button_label;
+	Gtk::Label invert_button_label;
 	Gtk::Label rec_enable_button_label;
 
 	void send_blink (bool);
@@ -104,12 +106,13 @@ class RouteUI : public virtual AxisView
 	Gtk::Menu* solo_menu;
 	Gtk::Menu* sends_menu;
 
-
 	XMLNode *xml_node;
 	void ensure_xml_node ();
 
 	virtual XMLNode* get_automation_child_xml_node (Evoral::Parameter param);
 
+	bool invert_press(GdkEventButton*);
+	bool invert_release(GdkEventButton*);
 	bool mute_press(GdkEventButton*);
 	bool mute_release(GdkEventButton*);
 	bool solo_press(GdkEventButton*);