diff --git a/society-of-biblical-literature-author-date.csl b/society-of-biblical-literature-author-date.csl
index 86b33d5a11ac..c9606baca88a 100644
--- a/society-of-biblical-literature-author-date.csl
+++ b/society-of-biblical-literature-author-date.csl
@@ -481,7 +481,7 @@
       <text macro="point-locators"/>
     </group>
   </macro>
-  <citation et-al-min="4" et-al-use-first="1" disambiguate-add-names="true">
+  <citation et-al-min="4" et-al-use-first="1" disambiguate-add-names="true" disambiguate-add-year-suffix="true" disambiguate-add-givenname="true" givenname-disambiguation-rule="primary-name" collapse="year" after-collapse-delimiter="; ">
     <layout prefix="(" suffix=")" delimiter="; ">
       <group delimiter=", ">
         <group delimiter=" ">