diff --git a/src/Compiler/Hoopl/Combinators.hs b/src/Compiler/Hoopl/Combinators.hs
index 01b9a8a264c2378487d7844747782f14157814c4..0ff53a927f4f2046e760ac47bd870b341a98dc1d 100644
--- a/src/Compiler/Hoopl/Combinators.hs
+++ b/src/Compiler/Hoopl/Combinators.hs
@@ -6,6 +6,7 @@ module Compiler.Hoopl.Combinators
   , SimpleBwdRewrite, SimpleBwdRewrite3, noBwdRewrite, thenBwdRw
   , shallowBwdRw3, shallowBwdRw, deepBwdRw3, deepBwdRw, iterBwdRw
   , pairFwd, pairBwd, pairLattice
+  , Shape(..), ShapeT(..)
   )
 
 where