diff --git a/gtk2_ardour/ardour_ui.cc b/gtk2_ardour/ardour_ui.cc
index 0916007431..565bc2b989 100644
--- a/gtk2_ardour/ardour_ui.cc
+++ b/gtk2_ardour/ardour_ui.cc
@@ -131,7 +131,6 @@ typedef uint64_t microseconds_t;
 #include "keyboard.h"
 #include "keyeditor.h"
 #include "location_ui.h"
-#include "lua_script_manager.h"
 #include "luawindow.h"
 #include "main_clock.h"
 #include "missing_file_dialog.h"
diff --git a/gtk2_ardour/ardour_ui_dialogs.cc b/gtk2_ardour/ardour_ui_dialogs.cc
index 64037e843e..9431974776 100644
--- a/gtk2_ardour/ardour_ui_dialogs.cc
+++ b/gtk2_ardour/ardour_ui_dialogs.cc
@@ -49,7 +49,6 @@
 #include "gui_thread.h"
 #include "keyeditor.h"
 #include "location_ui.h"
-#include "lua_script_manager.h"
 #include "luawindow.h"
 #include "main_clock.h"
 #include "meterbridge.h"
diff --git a/gtk2_ardour/window_manager.h b/gtk2_ardour/window_manager.h
index 37744e5964..6279180249 100644
--- a/gtk2_ardour/window_manager.h
+++ b/gtk2_ardour/window_manager.h
@@ -27,6 +27,8 @@
 #include <glibmm/refptr.h>
 #include <sigc++/trackable.h>
 
+#include "lua_script_manager.h"
+
 #include "gtkmm2ext/bindings.h"
 #include "gtkmm2ext/window_proxy.h"