diff --git a/hpath-io/hpath-io.cabal b/hpath-io/hpath-io.cabal
index 55dd857..f74a01c 100644
--- a/hpath-io/hpath-io.cabal
+++ b/hpath-io/hpath-io.cabal
@@ -44,6 +44,8 @@ library
                    , unix >= 2.5
                    , unix-bytestring
                    , utf8-string
+  if !impl(ghc>=7.11)
+    build-depends:     transformers
   hs-source-dirs:      src
   default-language:    Haskell2010