diff --git a/Control/Monad/ST/Class.hs b/Control/Monad/ST/Class.hs
--- a/Control/Monad/ST/Class.hs
+++ b/Control/Monad/ST/Class.hs
@@ -13,7 +13,7 @@
 module Control.Monad.ST.Class (MonadST(..)) where
 
 import Control.Monad.Trans.Class
-#ifdef MIN_VERSION_base(4,4,0)
+#if MIN_VERSION_base(4,4,0)
 import Control.Monad.ST.Safe
 #else
 import Control.Monad.ST
diff --git a/monad-st.cabal b/monad-st.cabal
--- a/monad-st.cabal
+++ b/monad-st.cabal
@@ -1,6 +1,6 @@
 name:          monad-st
 category:      Control, Monads
-version:       0.2.2
+version:       0.2.3
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE