diff --git a/appendices/ini.xml b/appendices/ini.xml
index 09ced12eaa..4360a0ed71 100644
--- a/appendices/ini.xml
+++ b/appendices/ini.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.75 $ -->
+<!-- $Revision: 1.76 $ -->
 
 <appendix xml:id="ini" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <title>&php.ini; directives</title>
@@ -4267,6 +4267,14 @@ auto_prepend_file=security.php
         5.1.3 it is not necessary to have <link
         linkend="ini.register-argc-argv">register_argc_argv</link> disabled.
        </para>
+       <warning>
+        <para>
+         Usage of SERVER and ENV variables is checked during the compile time
+         so using them through e.g. <link
+         linkend="language.variables.variable">variable variables</link> will
+         not cause their initialization.
+        </para>
+       </warning>
       </listitem>
      </varlistentry>