diff --git a/src/Text/XML/Writer.hs b/src/Text/XML/Writer.hs
index 4ad04ca..9b67dc2 100644
--- a/src/Text/XML/Writer.hs
+++ b/src/Text/XML/Writer.hs
@@ -39,6 +39,7 @@ import Control.Monad.Writer.Strict
 import qualified Data.DList as DL
 import qualified Data.Map as M
 
+import Data.Default ()
 import Data.Text (Text)
 import qualified Data.Text as T
 import qualified Data.Text.Lazy.IO as TL
diff --git a/xml-conduit-writer.cabal b/xml-conduit-writer.cabal
index 250b7bc..9e4c298 100644
--- a/xml-conduit-writer.cabal
+++ b/xml-conduit-writer.cabal
@@ -34,7 +34,8 @@ library
     xml-conduit, xml-types,
     text,
     mtl, dlist,
-    containers
+    containers,
+    data-default
 
 test-suite tests
   type: exitcode-stdio-1.0