diff --git a/bibtex.csl b/bibtex.csl
index 7151cd52182..9004dda89f4 100644
--- a/bibtex.csl
+++ b/bibtex.csl
@@ -17,6 +17,7 @@
       <name>Brenton M. Wiernik</name>
       <email>zotero@wiernik.org</email>
     </contributor>
+    <category citation-format="label"/>
     <category field="generic-base"/>
     <updated>2012-09-14T21:22:32+00:00</updated>
     <rights license="http://creativecommons.org/licenses/by-sa/3.0/">This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 License</rights>