diff --git a/appendices/migration54.xml b/appendices/migration54.xml
index 2ee3bfb85b..744f26dcbb 100644
--- a/appendices/migration54.xml
+++ b/appendices/migration54.xml
@@ -1012,11 +1012,6 @@
 
    <simpara><link linkend="book.session">Sessions</link>:</simpara>
   <itemizedlist>
-   <listitem>
-    <simpara>
-     <constant>SID</constant>
-    </simpara>
-   </listitem>
    <listitem>
     <simpara>
      <constant>PHP_SESSION_ACTIVE</constant>
diff --git a/reference/session/constants.xml b/reference/session/constants.xml
index b2393c6397..50c3cc7616 100644
--- a/reference/session/constants.xml
+++ b/reference/session/constants.xml
@@ -11,7 +11,7 @@
    </term>
    <listitem>
     <simpara>
-     Since PHP 5.4.0. Constant containing either the session name and session ID in
+     Constant containing either the session name and session ID in
      the form of <literal>"name=ID"</literal> or empty string
      if session ID was set in an appropriate session cookie. This is
      the same id as the one returned by <function>session_id</function>.