diff --git a/src/Hpack/Run.hs b/src/Hpack/Run.hs
index 2eb7d90..2c9d034 100644
--- a/src/Hpack/Run.hs
+++ b/src/Hpack/Run.hs
@@ -7,6 +7,7 @@ module Hpack.Run (
   run
 , renderPackage
 , RenderSettings(..)
+, Alignment(..)
 , CommaStyle(..)
 , defaultRenderSettings
 #ifdef TEST