diff --git a/chrome/content/zotero/zoteroPane.xhtml b/chrome/content/zotero/zoteroPane.xhtml
index 8450bcdb3a..611bad2895 100644
--- a/chrome/content/zotero/zoteroPane.xhtml
+++ b/chrome/content/zotero/zoteroPane.xhtml
@@ -461,6 +461,8 @@
 									<menuitem label="12" type="checkbox"/>
 									<menuitem label="13" type="checkbox"/>
 									<menuitem label="14" type="checkbox"/>
+									<menuitem label="15" type="checkbox"/>
+									<menuitem label="16" type="checkbox"/>
 									<menuitem label="18" type="checkbox"/>
 									<menuitem label="24" type="checkbox"/>
 									<menuitem label="36" type="checkbox"/>