diff --git a/docs/configuration_file_basics.xml b/docs/configuration_file_basics.xml
index 8fd538fcc..b151f14e7 100644
--- a/docs/configuration_file_basics.xml
+++ b/docs/configuration_file_basics.xml
@@ -1868,6 +1868,15 @@ SHELL cat /etc/shorewall/rules.d/*.rules 2&gt; /dev/null || true</programlisting
           action is entered, the variable's value is unchanged.</para>
         </listitem>
       </varlistentry>
+
+      <varlistentry>
+        <term>@caller (@{caller})</term>
+
+        <listitem>
+          <para>Added in Shorewall 4.5.13. Within an action, expands to the
+          name of the chain that invoked the action.</para>
+        </listitem>
+      </varlistentry>
     </variablelist>
 
     <para>Beginning with Shorewall 4.5.13, the values of @chain and