diff --git a/uulib.cabal b/uulib.cabal
--- a/uulib.cabal
+++ b/uulib.cabal
@@ -1,7 +1,7 @@
 cabal-version: >=1.1
 build-type: Simple
 name: uulib
-version: 0.9.7
+version: 0.9.8
 license: LGPL
 license-file: COPYRIGHT
 maintainer: Arie Middelkoop <ariem@cs.uu.nl>
@@ -27,6 +27,7 @@
                  UU.DData.IntMap  
                  UU.DData.IntSet        
 extensions:  RankNTypes FunctionalDependencies TypeSynonymInstances UndecidableInstances FlexibleInstances MultiParamTypeClasses FlexibleContexts CPP ExistentialQuantification
+ghc-options: -fglasgow-exts
 hs-source-dirs: src
 extra-source-files: README, LICENSE-LGPL,
                     examples/bibtex/Bibtex.hs,