diff --git a/seqloc.cabal b/seqloc.cabal
--- a/seqloc.cabal
+++ b/seqloc.cabal
@@ -1,5 +1,5 @@
 Name:                seqloc
-Version:             0.3.1.1
+Version:             0.3.1.2
 Cabal-Version:       >= 1.2
 Synopsis:            Handle sequence locations for bioinformatics
 Description:         Handle sequence locations for bioinformatics
diff --git a/src/Bio/SeqLoc/Strand.hs b/src/Bio/SeqLoc/Strand.hs
--- a/src/Bio/SeqLoc/Strand.hs
+++ b/src/Bio/SeqLoc/Strand.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE OverloadedStrings, TypeSynonymInstances #-}
+{-# LANGUAGE OverloadedStrings, TypeSynonymInstances, FlexibleInstances #-}
 
 {-| Utilities for manipulating nucleotide sequences and locations on
 nucleotide sequences that occur on a forward or a reverse-complement