diff --git a/gdk/x11/gdksettings.c b/gdk/x11/gdksettings.c
index 86ecc2dfec..62a4ea35f8 100644
--- a/gdk/x11/gdksettings.c
+++ b/gdk/x11/gdksettings.c
@@ -59,6 +59,9 @@ static const struct {
   {"Gtk/ShellShowsMenubar",   "gtk-shell-shows-menubar"},
   {"Gtk/ShellShowsDesktop",   "gtk-shell-shows-desktop"},
   {"Gtk/DecorationLayout",    "gtk-decoration-layout"},
+  {"Gtk/TitlebarDoubleClick", "gtk-titlebar-double-click"},
+  {"Gtk/TitlebarMiddleClick", "gtk-titlebar-middle-click"},
+  {"Gtk/TitlebarRightClick", "gtk-titlebar-right-click"},
   {"Gtk/DialogsUseHeader",    "gtk-dialogs-use-header"},
   {"Gtk/EnablePrimaryPaste",  "gtk-enable-primary-paste"},
   {"Gtk/RecentFilesMaxAge",   "gtk-recent-files-max-age"},