diff --git a/bookkeeping.cabal b/bookkeeping.cabal
--- a/bookkeeping.cabal
+++ b/bookkeeping.cabal
@@ -1,5 +1,5 @@
 name:                bookkeeping
-version:             0.2.0.0
+version:             0.2.0.1
 synopsis:            A module for bookkeeping by double entry.
 description:
     A module for bookkeeping by double entry. This module provides a way to do bookkeeping programmatically.
diff --git a/src/Business/Bookkeeping.hs b/src/Business/Bookkeeping.hs
--- a/src/Business/Bookkeeping.hs
+++ b/src/Business/Bookkeeping.hs
@@ -38,6 +38,7 @@
   , Month(..)
   , Date(..)
   , Description(..)
+  , SubDescription(..)
   , Amount(..)
   , Category(..)
   , CategoryName(..)