diff --git a/chrome/content/zotero/tools/cslpreview.xul b/chrome/content/zotero/tools/cslpreview.xul
index 22a64069e..4b7251e11 100644
--- a/chrome/content/zotero/tools/cslpreview.xul
+++ b/chrome/content/zotero/tools/cslpreview.xul
@@ -37,8 +37,6 @@
 	
 	<script>
 	<![CDATA[
-		default xml namespace = "http://purl.org/net/xbiblio/csl";
-
 		var Zotero_CSL_Preview = new function() {
 			this.init = init;
 			this.refresh = refresh;