diff --git a/src/XMonad/Config.hs b/src/XMonad/Config.hs
index 793096e..ace588a 100644
--- a/src/XMonad/Config.hs
+++ b/src/XMonad/Config.hs
@@ -1,5 +1,6 @@
 {-# OPTIONS_GHC -fno-warn-missing-signatures -fno-warn-orphans #-}
 {-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE TypeOperators #-}
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  XMonad.Config