diff --git a/setup/index.php b/setup/index.php
index e93a95481..c9ed49ceb 100644
--- a/setup/index.php
+++ b/setup/index.php
@@ -166,7 +166,7 @@ function CheckPHPVersion(SetupWebPage $oP)
 		$oP->error("Error: The current PHP Version (".phpversion().") is lower than the minimum required version (".PHP_MIN_VERSION.")");
 		return false;
 	}
-	$aMandatoryExtensions = array('mysql', 'iconv', 'simplexml', 'soap');
+	$aMandatoryExtensions = array('mysql', 'iconv', 'simplexml', 'soap', 'hash', 'json', 'session', 'pcre');
 	$aOptionalExtensions = array('mcrypt' => 'Strong encryption will not be used.',
 								 'ldap' => 'LDAP authentication will be disabled.');
 	asort($aMandatoryExtensions); // Sort the list to look clean !