diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
index 60fea98f501..095acfe6582 100644
--- a/doc/src/sgml/protocol.sgml
+++ b/doc/src/sgml/protocol.sgml
@@ -366,7 +366,10 @@
    </para>
 
    <table id="protocol-versions-table">
+<!--
     <title>Protocol Versions</title>
+-->
+    <title>プロトコルバージョン</title>
 
     <tgroup cols="3">
      <thead>