diff --git a/XMonad/Layout/Spacing.hs b/XMonad/Layout/Spacing.hs
index e0a25dd4..ae6ccec2 100644
--- a/XMonad/Layout/Spacing.hs
+++ b/XMonad/Layout/Spacing.hs
@@ -28,7 +28,7 @@ module XMonad.Layout.Spacing (
 import Graphics.X11 (Rectangle(..))
 import Control.Arrow (second)
 import XMonad.Operations (sendMessage)
-import XMonad.Core (runLayout,Message,fromMessage,Typeable)
+import XMonad.Core (X,runLayout,Message,fromMessage,Typeable)
 import XMonad.StackSet (up, down, Workspace(..))
 import XMonad.Util.Font (fi)