diff --git a/jsaddle-webkit2gtk.cabal b/jsaddle-webkit2gtk.cabal
--- a/jsaddle-webkit2gtk.cabal
+++ b/jsaddle-webkit2gtk.cabal
@@ -1,5 +1,5 @@
 name: jsaddle-webkit2gtk
-version: 0.9.8.3
+version: 0.9.8.4
 cabal-version: >=1.10
 build-type: Simple
 license: MIT
diff --git a/src/Language/Javascript/JSaddle/WebKitGTK.hs b/src/Language/Javascript/JSaddle/WebKitGTK.hs
--- a/src/Language/Javascript/JSaddle/WebKitGTK.hs
+++ b/src/Language/Javascript/JSaddle/WebKitGTK.hs
@@ -139,7 +139,7 @@
 
     addJSaddleHandler webView processResults syncResults
     webViewRunJavascript webView (decodeUtf8 $ toStrict jsaddleJs) noCancellable . Just $
-        \_obj _asyncResult _data ->
+        \_obj _asyncResult ->
             void $ forkIO start
 
 onUserContentManagerScriptMessageReceived :: (IsUserContentManager a, MonadIO m) => a -> UserContentManagerScriptMessageReceivedCallback -> m SignalHandlerId