diff --git a/gtk2_ardour/ardour.menus.in b/gtk2_ardour/ardour.menus.in
index 8a913e9c7d..e4dbfa52dd 100644
--- a/gtk2_ardour/ardour.menus.in
+++ b/gtk2_ardour/ardour.menus.in
@@ -555,6 +555,7 @@
 		   </menu>
 	       <menu action='MiscOptions'>
                	     <menuitem action='toggle-seamless-loop'/>
+               	     <menuitem action='toggle-replicate-missing-region-channels'/>
                	     <menuitem action='UseOSC'/>
                	     <menuitem action='NewPluginsActive'/>
                	     <menuitem action='LatchedRecordEnable'/>
diff --git a/gtk2_ardour/editor.h b/gtk2_ardour/editor.h
index 95f2c2eb05..992ac591a6 100644
--- a/gtk2_ardour/editor.h
+++ b/gtk2_ardour/editor.h
@@ -365,6 +365,8 @@ class Editor : public PublicEditor
 	
 	void toggle_link_region_and_track_selection ();
 
+	void toggle_replicate_missing_region_channels ();
+
 	/* redirect shared ops menu. caller must free returned menu */
 
 	Gtk::Menu* redirect_menu ();
diff --git a/gtk2_ardour/editor_actions.cc b/gtk2_ardour/editor_actions.cc
index 87912d84f0..89136db682 100644
--- a/gtk2_ardour/editor_actions.cc
+++ b/gtk2_ardour/editor_actions.cc
@@ -118,6 +118,8 @@ Editor::register_actions ()
 	act = ActionManager::register_toggle_action (editor_actions, "toggle-auto-xfades", _("Created Automatically"), mem_fun(*this, &Editor::toggle_auto_xfade));
 	ActionManager::session_sensitive_actions.push_back (act);
 
+	act = ActionManager::register_toggle_action (editor_actions, "toggle-replicate-missing-region-channels", _("Replicate Missing Channels"), mem_fun(*this, &Editor::toggle_replicate_missing_region_channels));
+	ActionManager::session_sensitive_actions.push_back (act);
 	act = ActionManager::register_toggle_action (editor_actions, "toggle-region-fades", _("Use Region Fades"), mem_fun(*this, &Editor::toggle_region_fades));
 	ActionManager::session_sensitive_actions.push_back (act);
 	act = ActionManager::register_toggle_action (editor_actions, "toggle-region-fades-visible", _("Show Region Fades"), mem_fun(*this, &Editor::toggle_region_fades_visible));
@@ -1685,6 +1687,12 @@ Editor::subframes_per_frame_chosen (uint32_t sfpf)
 	}
 }
 
+void
+Editor::toggle_replicate_missing_region_channels ()
+{
+	ActionManager::toggle_config_state ("Editor", "toggle-replicate-missing-region-channels", &Configuration::set_replicate_missing_region_channels, &Configuration::get_replicate_missing_region_channels);
+}
+
 void
 Editor::toggle_region_fades ()
 {