diff --git a/Bio/Alignment/Bowtie.hs b/Bio/Alignment/Bowtie.hs
index 883b057..3e58f0e 100644
--- a/Bio/Alignment/Bowtie.hs
+++ b/Bio/Alignment/Bowtie.hs
@@ -1 +1,2 @@
+{-# LANGUAGE FlexibleContexts #-}
 {-| This module provides a data type to represent an alignment
