diff --git a/app/scripts/fetch_xulrunner b/app/scripts/fetch_xulrunner
index 75fcb61d5c..81e4ee5dab 100755
--- a/app/scripts/fetch_xulrunner
+++ b/app/scripts/fetch_xulrunner
@@ -309,8 +309,8 @@ function modify_omni {
 	replace_line 'ui.infoIcon.addEventListener' 'if (!ui.infoIcon.complete) ui.infoIcon.addEventListener' chrome/toolkit/content/global/commonDialog.js
 	
 	# Import style into built-in dialogs
-	replace_line '<window id=\"commonDialogWindow\"' \
-		'<window id=\"commonDialogWindow\" class=\"zotero-dialog\"' \
+	replace_line 'id=\"commonDialogWindow\"' \
+		'id=\"commonDialogWindow\" class=\"zotero-dialog\"' \
 		chrome/toolkit/content/global/commonDialog.xhtml
 	replace_line '<\?xml-stylesheet href=\"chrome:\/\/global\/skin\/commonDialog.css\" type=\"text\/css\"\?>' \
 		'<\?xml-stylesheet href=\"chrome:\/\/global\/skin\/commonDialog.css\" type=\"text\/css\"\?>