commit d986482ef065a8762ae880585c6c2b8e4aab9dcb
Author: Daniel Firth <dan.firth@homotopic.tech>
Date:   Sat Dec 2 23:56:50 2023 +0000

    ghc 9.6 compat

diff --git a/src/Text/XML/Writer.hs b/src/Text/XML/Writer.hs
index 65e8f66..13fda5d 100644
--- a/src/Text/XML/Writer.hs
+++ b/src/Text/XML/Writer.hs
@@ -36,6 +36,7 @@ module Text.XML.Writer
     ) where
 
 import Text.XML
+import Control.Monad
 import Control.Monad.Writer.Strict
 import Data.Default ()
 import qualified Data.DList as DL