diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
index b5395604fb8..9d755232873 100644
--- a/doc/src/sgml/protocol.sgml
+++ b/doc/src/sgml/protocol.sgml
@@ -4327,7 +4327,7 @@ psql "dbname=postgres replication=database" -c "IDENTIFY_SYSTEM;"
     <listitem>
      <variablelist>
       <varlistentry>
-       <term>Int32(16)</term>
+       <term>Int32</term>
        <listitem>
         <para>
          Length of message contents in bytes, including self.