diff --git a/concraft-pl.cabal b/concraft-pl.cabal
--- a/concraft-pl.cabal
+++ b/concraft-pl.cabal
@@ -1,5 +1,5 @@
 name:               concraft-pl
-version:            2.1.0
+version:            2.1.1
 synopsis:           Morphological tagger for Polish
 description:
     A morphological tagger for Polish based on the concraft library.
diff --git a/src/NLP/Concraft/Polish/Format/Plain.hs b/src/NLP/Concraft/Polish/Format/Plain.hs
--- a/src/NLP/Concraft/Polish/Format/Plain.hs
+++ b/src/NLP/Concraft/Polish/Format/Plain.hs
@@ -1,5 +1,6 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE CPP #-}
 
 -- | Simple format for morphosyntax representation which assumes that all tags
 -- have a textual representation with no spaces within and that one of the tags
@@ -19,7 +20,10 @@
 , showSent
 ) where
 
--- import           Prelude hiding ((<>))
+#if MIN_VERSION_base(4,11,0)
+import           Prelude hiding ((<>))
+#endif
+
 import           Data.Monoid (Monoid, mappend, mconcat)
 import           Data.Maybe (catMaybes)
 import           Data.List (groupBy)