diff --git a/Data/PQueue/Internals.hs b/Data/PQueue/Internals.hs
--- a/Data/PQueue/Internals.hs
+++ b/Data/PQueue/Internals.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE CPP #-}
+{-# LANGUAGE CPP, StandaloneDeriving #-}
 
 module Data.PQueue.Internals (
 	MinQueue (..),
diff --git a/pqueue.cabal b/pqueue.cabal
--- a/pqueue.cabal
+++ b/pqueue.cabal
@@ -1,5 +1,5 @@
 Name:		pqueue
-Version:	1.1.0
+Version:	1.2.0
 Category:	Data Structures
 Author:		Louis Wasserman
 License:	BSD3