diff --git a/language/constants.xml b/language/constants.xml
index 2f64ec6b4a..52050ef4e0 100644
--- a/language/constants.xml
+++ b/language/constants.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.48 $ -->
+<!-- $Revision: 1.49 $ -->
  <chapter xml:id="language.constants" xmlns="http://docbook.org/ns/docbook">
   <title>Constants</title>
 
@@ -224,6 +224,13 @@ echo Constant; // outputs "Constant" and issues a notice.
          returned as it was declared (case-sensitive).
         </entry>
        </row>
+       <row>
+        <entry><constant>__NAMESPACE__</constant></entry>
+        <entry>
+         The name of the current namespace (case-sensitive). This constant 
+         is defined in compile-time (Added in PHP 5.3.0).
+        </entry>
+       </row>
       </tbody>
      </tgroup>
     </table>