diff --git a/doc/common_options.sgml.in b/doc/common_options.sgml.in
index 929e4f7f6..38783dd1e 100644
--- a/doc/common_options.sgml.in
+++ b/doc/common_options.sgml.in
@@ -105,6 +105,15 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 	</para>
       </listitem>
     </varlistentry>
+
+    <varlistentry>
+      <term><option>--version</option></term>
+      <listitem>
+        <para>
+          Show the version number.
+        </para>
+      </listitem>
+    </varlistentry>
   </variablelist>
 
 </refsect1>
diff --git a/doc/ja/common_options.sgml.in b/doc/ja/common_options.sgml.in
index 8069ac6aa..912298f79 100644
--- a/doc/ja/common_options.sgml.in
+++ b/doc/ja/common_options.sgml.in
@@ -139,6 +139,18 @@ by KATOH Yasufumi <karma at jazz.email.ne.jp>
 	</para>
       </listitem>
     </varlistentry>
+
+    <varlistentry>
+      <term><option>--version</option></term>
+      <listitem>
+        <para>
+          <!--
+          Show the version number.
+          -->
+          バージョン番号を表示します。
+        </para>
+      </listitem>
+    </varlistentry>
   </variablelist>
 
 </refsect1>