diff --git a/static/js/coverDialog.js b/static/js/coverDialog.js
index 415edaf..778824b 100644
--- a/static/js/coverDialog.js
+++ b/static/js/coverDialog.js
@@ -23,6 +23,7 @@ oml.ui.coverDialog = function(id, url) {
             buttons: [
                 Ox.Button({
                     id: 'close',
+                    style: 'squared',
                     title: Ox._('Close')
                 })
                 .bindEvent({