diff --git a/htdocs/filefunc.inc.php b/htdocs/filefunc.inc.php
index df1c52a7722..0aefa65904f 100755
--- a/htdocs/filefunc.inc.php
+++ b/htdocs/filefunc.inc.php
@@ -29,8 +29,8 @@
  *  \brief      File that include conf.php file and commons lib like functions.lib.php
  */
 
-define('DOL_VERSION','3.2.0-alpha');	// Also defined in htdocs/install/inc.php (Ex: x.y.z-alpha, x.y.z)
-define('EURO',chr(128));
+if (! defined('DOL_VERSION')) define('DOL_VERSION','3.2.0-alpha');	// Also defined in htdocs/install/inc.php (Ex: x.y.z-alpha, x.y.z)
+if (! defined('EURO')) define('EURO',chr(128));
 
 // Definition des constantes syslog
 if (function_exists("define_syslog_variables"))