diff --git a/Numeric/Interval.hs b/Numeric/Interval.hs
--- a/Numeric/Interval.hs
+++ b/Numeric/Interval.hs
@@ -13,7 +13,8 @@
 -----------------------------------------------------------------------------
 
 module Numeric.Interval 
-    ( whole
+    ( Interval(..)
+    , whole
     , empty
     , null
     , singleton
diff --git a/intervals.cabal b/intervals.cabal
--- a/intervals.cabal
+++ b/intervals.cabal
@@ -1,5 +1,5 @@
 Name:              intervals
-Version:           0.1.0
+Version:           0.1.1
 Synopsis:          Interval Arithmetic
 Homepage:          http://patch-tag.com/r/ekmett/intervals
 License:           BSD3