diff --git a/Setup.hs b/Setup.hs
--- a/Setup.hs
+++ b/Setup.hs
@@ -55,14 +55,13 @@
         Just v -> do
             installName <- evalRuby "print RbConfig::CONFIG['RUBY_INSTALL_NAME']"
             headerDir   <- evalRuby "print RbConfig::CONFIG['rubyhdrdir']"
-            headerDir'  <- evalRuby "print RbConfig::CONFIG['rubyhdrdir'] + File::Separator + 'ruby'"
             archDir     <- evalRuby "print RbConfig::CONFIG['rubyarchhdrdir']"
             libDir      <- evalRuby "print RbConfig::CONFIG['libdir']"
             td          <- evalRuby "print RbConfig::CONFIG['topdir']"
             libName     <- evalRuby "print RbConfig::CONFIG['LIBRUBY_SO'].sub(/^lib/,'').sub(/\\.(so|dll|dylib)([.0-9]+)?$/,'')"
             return $ RubyInfo <$> pure v
                               <*> installName
-                              <*> sequence [headerDir, headerDir', archDir, td]
+                              <*> sequence [headerDir, archDir, td]
                               <*> libDir
                               <*> libName
 
diff --git a/hruby.cabal b/hruby.cabal
--- a/hruby.cabal
+++ b/hruby.cabal
@@ -2,7 +2,7 @@
 --  see http://haskell.org/cabal/users-guide/
 
 name:                hruby
-version:             0.3.4.2
+version:             0.3.4.3
 synopsis:            Embed a Ruby intepreter in your Haskell program !
 description:         This doesn't work with Ruby 1.9. Everything you need should be in Foreign.Ruby.Safe.
 license:             BSD3