diff --git a/journal-of-the-royal-society-of-western-australia.csl b/journal-of-the-royal-society-of-western-australia.csl
index eb9b9e1cd2d..6b970528db8 100644
--- a/journal-of-the-royal-society-of-western-australia.csl
+++ b/journal-of-the-royal-society-of-western-australia.csl
@@ -185,6 +185,10 @@
     </choose>
   </macro>
   <citation et-al-min="3" et-al-use-first="1" disambiguate-add-year-suffix="true" disambiguate-add-givenname="true">
+    <sort>
+      <key macro="year-date"/>
+      <key macro="author-short"/>
+    </sort>
     <layout delimiter="; " prefix="(" suffix=")">
       <group delimiter=", ">
         <group delimiter=" ">