diff --git a/pkgs/desktops/mate/mate-applets/default.nix b/pkgs/desktops/mate/mate-applets/default.nix
index 764f86cf061e..dfb4e4620c51 100644
--- a/pkgs/desktops/mate/mate-applets/default.nix
+++ b/pkgs/desktops/mate/mate-applets/default.nix
@@ -15,6 +15,7 @@
 , libgtop
 , libxml2
 , libnotify
+, mate-desktop
 , mate-panel
 , polkit
 , upower
@@ -53,6 +54,7 @@ stdenv.mkDerivation rec {
     libnotify
     libwnck
     libxml2
+    mate-desktop # for org.mate.lockdown
     mate-panel
     polkit
     upower