diff --git a/Control/Monad/Trans/Class.hs b/Control/Monad/Trans/Class.hs
--- a/Control/Monad/Trans/Class.hs
+++ b/Control/Monad/Trans/Class.hs
@@ -5,7 +5,7 @@
 #if __GLASGOW_HASKELL__ >= 710 && __GLASGOW_HASKELL__ < 802
 {-# LANGUAGE AutoDeriveTypeable #-}
 #endif
-#if __GLASGOW_HASKELL__ >= 808
+#if __GLASGOW_HASKELL__ >= 806
 {-# LANGUAGE QuantifiedConstraints #-}
 #endif
 -----------------------------------------------------------------------------
diff --git a/changelog b/changelog
--- a/changelog
+++ b/changelog
@@ -1,5 +1,8 @@
 -*-change-log-*-
 
+0.6.0.6 Ross Paterson <R.Paterson@city.ac.uk> Jan 2023
+	* Fix for GHC 8.6
+
 0.6.0.5 Ross Paterson <R.Paterson@city.ac.uk> Jan 2023
 	* Revert to allowing MonadTrans constraint with GHC >= 8.6
 
diff --git a/transformers.cabal b/transformers.cabal
--- a/transformers.cabal
+++ b/transformers.cabal
@@ -1,5 +1,5 @@
 name:         transformers
-version:      0.6.0.5
+version:      0.6.0.6
 license:      BSD3
 license-file: LICENSE
 author:       Andy Gill, Ross Paterson