diff --git a/appendices/tokens.xml b/appendices/tokens.xml
index fc5df01e31..f2a7792406 100644
--- a/appendices/tokens.xml
+++ b/appendices/tokens.xml
@@ -706,7 +706,7 @@
      <entry><constant>T_USE</constant></entry>
      <entry>use</entry>
      <entry><link linkend="language.namespaces">namespaces</link>
-     (available since PHP 5.3.0)</entry>
+     (available since PHP 5.3.0; reserved since PHP 4.0.0)</entry>
     </row>
     <row>
      <entry><constant>T_VAR</constant></entry>