diff --git a/pkgs/desktops/gnome-3/3.12/core/caribou/default.nix b/pkgs/desktops/gnome-3/3.12/core/caribou/default.nix
index 4d2f390c0428..3a6c3f0dd357 100644
--- a/pkgs/desktops/gnome-3/3.12/core/caribou/default.nix
+++ b/pkgs/desktops/gnome-3/3.12/core/caribou/default.nix
@@ -1,5 +1,5 @@
 { fetchurl, stdenv, pkgconfig, gnome3, clutter, dbus, pythonPackages, libxml2
-, libxklavier, libXtst, gtk2, intltool, libxslt }:
+, libxklavier, libXtst, gtk2, intltool, libxslt, at_spi2_core }:
 
 
 stdenv.mkDerivation rec {