diff --git a/chrome/content/zotero/standalone/standalone.xul b/chrome/content/zotero/standalone/standalone.xul
index 39d3f117c2..b9aa924ff3 100644
--- a/chrome/content/zotero/standalone/standalone.xul
+++ b/chrome/content/zotero/standalone/standalone.xul
@@ -394,6 +394,8 @@
 									<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"/>