diff --git a/System/Directory/Tree.hs b/System/Directory/Tree.hs
--- a/System/Directory/Tree.hs
+++ b/System/Directory/Tree.hs
@@ -116,7 +116,6 @@
 
 import Data.Ord (comparing)
 import Data.List (sort, (\\))
-import Data.Maybe (mapMaybe)
 
 import Control.Applicative
 import qualified Data.Traversable as T
diff --git a/directory-tree.cabal b/directory-tree.cabal
--- a/directory-tree.cabal
+++ b/directory-tree.cabal
@@ -1,5 +1,5 @@
 name:            directory-tree
-version:         0.9.0
+version:         0.9.1
 homepage:        http://coder.bsimmons.name/blog/2009/05/directory-tree-module-released/
 synopsis:        A simple directory-like tree datatype, with useful IO functions 
 description:     A simple directory-like tree datatype, with useful IO functions and Foldable and Traversable instance