diff --git a/chrome/skin/default/zotero/standalone.css b/chrome/skin/default/zotero/standalone.css
index 86070d281..01c16f53d 100644
--- a/chrome/skin/default/zotero/standalone.css
+++ b/chrome/skin/default/zotero/standalone.css
@@ -1,4 +1,4 @@
 #zotero-tb-item-from-page, #zotero-tb-snapshot-from-page, #zotero-tb-link-from-page,
-#zotero-tb-fullscreen, #zotero-fullscreen-close-separator {
+#zotero-tb-fullscreen, #zotero-fullscreen-close-separator, #zotero-close-button {
 	display: none;
 }
\ No newline at end of file