diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # ChangeLog for monad-logger
 
+## 0.3.39
+
+* Make the previous change backwards compatible with CPP
+
 ## 0.3.38
 
 * Drop old deprecated instances to support transformers 0.6 [#39](https://github.com/snoyberg/monad-logger/pull/39)
diff --git a/Control/Monad/Logger.hs b/Control/Monad/Logger.hs
--- a/Control/Monad/Logger.hs
+++ b/Control/Monad/Logger.hs
@@ -138,6 +138,10 @@
 
 import Control.Monad.Trans.Identity ( IdentityT)
 import Control.Monad.Trans.Maybe    ( MaybeT   )
+#if !MIN_VERSION_transformers(0, 6, 0)
+import Control.Monad.Trans.List     ( ListT    )
+import Control.Monad.Trans.Error    ( ErrorT, Error)
+#endif
 import Control.Monad.Trans.Except   ( ExceptT  )
 
 import Control.Monad.Trans.Reader   ( ReaderT  )
@@ -247,6 +251,10 @@
 
 #define DEF monadLoggerLog a b c d = Trans.lift $ monadLoggerLog a b c d
 instance MonadLogger m => MonadLogger (IdentityT m) where DEF
+#if !MIN_VERSION_transformers(0, 6, 0)
+instance MonadLogger m => MonadLogger (ListT m) where DEF
+instance (MonadLogger m, Error e) => MonadLogger (ErrorT e m) where DEF
+#endif
 instance MonadLogger m => MonadLogger (MaybeT m) where DEF
 instance MonadLogger m => MonadLogger (ExceptT e m) where DEF
 instance MonadLogger m => MonadLogger (ReaderT r m) where DEF
@@ -263,6 +271,10 @@
 #undef DEF
 
 instance MonadLoggerIO m => MonadLoggerIO (IdentityT m)
+#if !MIN_VERSION_transformers(0, 6, 0)
+instance MonadLoggerIO m => MonadLoggerIO (ListT m)
+instance (MonadLoggerIO m, Error e) => MonadLoggerIO (ErrorT e m)
+#endif
 instance MonadLoggerIO m => MonadLoggerIO (MaybeT m)
 instance MonadLoggerIO m => MonadLoggerIO (ExceptT e m)
 instance MonadLoggerIO m => MonadLoggerIO (ReaderT r m)
diff --git a/monad-logger.cabal b/monad-logger.cabal
--- a/monad-logger.cabal
+++ b/monad-logger.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           monad-logger
-version:        0.3.38
+version:        0.3.39
 synopsis:       A class of monads which can log messages.
 description:    See README and Haddocks at <https://www.stackage.org/package/monad-logger>
 category:       System