diff --git a/Resources/doc/cache.rst b/Resources/doc/cache.rst
index 0090361..1c12010 100644
--- a/Resources/doc/cache.rst
+++ b/Resources/doc/cache.rst
@@ -21,6 +21,8 @@ The lifetime in seconds of a WSDL file in the cache (**86400 is the default valu
 
 The limit is the maximum number of in-memory cached WSDL files (**5 is the default value by PHP**).
 
+The WSDL files cached are written in cache folder of your Symfony2 application.
+
 If you want more information you can visit the following page `PHP Soap runtime configuration`_.
 
 .. _`PHP Soap runtime configuration`: http://www.php.net/manual/en/soap.configuration.php
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