diff --git a/csl/mla.csl b/csl/mla.csl
index a8bb17f1d8..b17eb7c870 100644
--- a/csl/mla.csl
+++ b/csl/mla.csl
@@ -113,6 +113,7 @@
     <option name="et-al-min" value="4"/>
     <option name="et-al-use-first" value="1"/>
     <option name="line-spacing" value="2"/>
+    <option name="subsequent-author-substitute" value="---"/>
     <sort>
       <key macro="author"/>
       <key variable="title"/>