diff --git a/contrib/gtk-module/README b/contrib/gtk-module/README
index 0ede3ea3c..4cfb5fcde 100644
--- a/contrib/gtk-module/README
+++ b/contrib/gtk-module/README
@@ -16,3 +16,5 @@ Notes:
 
  * At the moment the window XID is not detected correctly, which means focus
    stealing prevention may not work properly.  We're working on this.
+ * gnome-packagekit 0.4.x is needed for the InstallFonts method.
+