diff --git a/Control/Monad/Trans/List.hs b/Control/Monad/Trans/List.hs
--- a/Control/Monad/Trans/List.hs
+++ b/Control/Monad/Trans/List.hs
@@ -146,7 +146,7 @@
 instance (MonadFix m) => MonadFix (ListT m) where
     mfix f = ListT $ mfix (runListT . f . head) >>= \ xs -> case xs of
         [] -> return []
-        x:_ -> liftM (x:) (runListT (mfix (mapListT (fmap tail) . f)))
+        x:_ -> liftM (x:) (runListT (mfix (mapListT (liftM tail) . f)))
     {-# INLINE mfix #-}
 
 instance MonadTrans ListT where
diff --git a/changelog b/changelog
--- a/changelog
+++ b/changelog
@@ -1,5 +1,8 @@
 -*-change-log-*-
 
+0.5.6.2 Ross Paterson <R.Paterson@city.ac.uk> Feb 2019
+	* Further backward compatability fix
+
 0.5.6.1 Ross Paterson <R.Paterson@city.ac.uk> Feb 2019
 	* Backward compatability fix for MonadFix ListT instance
 
diff --git a/transformers.cabal b/transformers.cabal
--- a/transformers.cabal
+++ b/transformers.cabal
@@ -1,5 +1,5 @@
 name:         transformers
-version:      0.5.6.1
+version:      0.5.6.2
 license:      BSD3
 license-file: LICENSE
 author:       Andy Gill, Ross Paterson