diff --git a/index.php b/index.php
index d0077b885..b05fec861 100644
--- a/index.php
+++ b/index.php
@@ -7,7 +7,7 @@ $sSetupPage = './setup/index.php';
  * Check that the configuration file exists and has the appropriate access rights
  * If the file does not exist, launch the configuration wizard to create it
  */  
-if (file_exists($sConfigFile))
+if (file_exists(dirname(__FILE__).'/'.$sConfigFile))
 {
 	if (!is_readable($sConfigFile))
 	{