diff --git a/src/Documentation/Haddock.hs b/src/Documentation/Haddock.hs
index 0138861bc9f547b37c87bd32490c10a69101f80d..5216b5111770ccf0acdb99e140c73b422c1147ef 100644
--- a/src/Documentation/Haddock.hs
+++ b/src/Documentation/Haddock.hs
@@ -33,7 +33,7 @@ module Documentation.Haddock (
 
   -- * Instances
   DocInstance,
-  InstHead(..),
+  InstHead,
 
   -- * Documentation comments
   Doc(..),