diff --git a/reference/info/functions/dl.xml b/reference/info/functions/dl.xml
index ad1f5cdd49..c4724a7fcb 100644
--- a/reference/info/functions/dl.xml
+++ b/reference/info/functions/dl.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.4 $ -->
+<!-- $Revision: 1.5 $ -->
 <!-- splitted from ./en/functions/info.xml, last change in rev 1.29 -->
   <refentry id="function.dl">
    <refnamediv>
@@ -33,7 +33,9 @@
     </para>
     <para>
      Use <function>extension_loaded</function> to test whether a given
-     extension is already available or not.
+     extension is already available or not. This works on both built-in
+     extensions and dynamically loaded ones (either through
+     <literal>PHP.INI</literal> or <function>dl</function>).
     </para>
     <para>
      Example: