diff --git a/Data/IntMap.hs b/Data/IntMap.hs
--- a/Data/IntMap.hs
+++ b/Data/IntMap.hs
@@ -58,7 +58,7 @@
     , foldWithKey
     ) where
 
-import Prelude hiding (lookup,map,filter,foldr,foldl,null)
+import Prelude ()  -- hide foldr
 import qualified Data.IntMap.Strict as Strict
 import Data.IntMap.Lazy
 
diff --git a/containers.cabal b/containers.cabal
--- a/containers.cabal
+++ b/containers.cabal
@@ -1,5 +1,5 @@
 name: containers
-version: 0.5.3.0
+version: 0.5.3.1
 license: BSD3
 license-file: LICENSE
 maintainer: fox@ucw.cz