diff --git a/pkgs/desktops/kde-4.8/kactivities.nix b/pkgs/desktops/kde-4.8/kactivities.nix
index 67ff8cd89846..8f726577ef89 100644
--- a/pkgs/desktops/kde-4.8/kactivities.nix
+++ b/pkgs/desktops/kde-4.8/kactivities.nix
@@ -1,7 +1,7 @@
-{ kde, kdelibs }:
+{ kde, kdelibs, shared_desktop_ontologies }:
 
 kde {
-  propagatedBuildInputs = [ kdelibs ];
+  propagatedBuildInputs = [ kdelibs shared_desktop_ontologies ];
 
   meta = {
     description = "KDE activities library and daemon";