diff --git a/gtk2_ardour/mixer_ui.cc b/gtk2_ardour/mixer_ui.cc
index 9ade58584b..a92c564af2 100644
--- a/gtk2_ardour/mixer_ui.cc
+++ b/gtk2_ardour/mixer_ui.cc
@@ -43,7 +43,6 @@
 #include "ardour/route_group.h"
 #include "ardour/route_sorters.h"
 #include "ardour/session.h"
-#include "ardour/revision.h" // XXX remove after 4.5 release
 
 #include "keyboard.h"
 #include "mixer_ui.h"
@@ -215,16 +214,10 @@ Mixer_UI::Mixer_UI ()
 	favorite_plugins_frame.set_shadow_type (Gtk::SHADOW_IN);
 	favorite_plugins_frame.add (favorite_plugins_scroller);
 
-	//  XXX remove after 4.5 release
-	if (!strcmp (ARDOUR::revision, "4.5") || strcmp (PROGRAM_NAME, "Ardour")) {
-		rhs_pane2.pack1 (track_display_frame);
-		rhs_pane2.pack2 (group_display_frame);
-	} else {
-		rhs_pane1.pack1 (favorite_plugins_frame, false, true);
-		rhs_pane1.pack2 (track_display_frame);
-		rhs_pane2.pack1 (rhs_pane1);
-		rhs_pane2.pack2 (group_display_frame);
-	}
+	rhs_pane1.pack1 (favorite_plugins_frame, false, true);
+	rhs_pane1.pack2 (track_display_frame);
+	rhs_pane2.pack1 (rhs_pane1);
+	rhs_pane2.pack2 (group_display_frame);
 
 	list_vpacker.pack_start (rhs_pane2, true, true);