diff --git a/chrome/content/zotero/integration/progressBar.xhtml b/chrome/content/zotero/integration/progressBar.xhtml
index 34020c1e9d..49900926e1 100644
--- a/chrome/content/zotero/integration/progressBar.xhtml
+++ b/chrome/content/zotero/integration/progressBar.xhtml
@@ -35,6 +35,7 @@
 	class="citation-dialog progress-bar"
 	orient="vertical"
 	title="&zotero.progress.title;"
+	no-titlebar-icon="true"
 	xmlns:html="http://www.w3.org/1999/xhtml"
 	xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
 	persist="screenX screenY">