diff --git a/src/Data/Semigroup/App.hs b/src/Data/Semigroup/App.hs
index 639c1c87c..875d3319d 100644
--- a/src/Data/Semigroup/App.hs
+++ b/src/Data/Semigroup/App.hs
@@ -1,5 +1,7 @@
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
-module Data.Semigroup.App where
+module Data.Semigroup.App
+( AppMerge(..)
+) where
 
 import Control.Applicative
 import Data.Semigroup