diff --git a/XMonad/Layout/Monitor.hs b/XMonad/Layout/Monitor.hs
index 24dbf264..031a7287 100644
--- a/XMonad/Layout/Monitor.hs
+++ b/XMonad/Layout/Monitor.hs
@@ -22,6 +22,7 @@ module XMonad.Layout.Monitor (
 
     -- * TODO
     -- $todo
+    Monitor(..),
     Property(..),
     MonitorMessage(..),
     addMonitor,