diff --git a/language/operators.xml b/language/operators.xml
index 967433e398..ee25d480ac 100644
--- a/language/operators.xml
+++ b/language/operators.xml
@@ -245,6 +245,7 @@
          <literal>^=</literal> 
          <literal>&lt;&lt;=</literal> 
          <literal>&gt;&gt;=</literal>
+         <literal>??=</literal>
         </entry>
         <entry>
          <link linkend="language.operators.assignment">assignment</link>