diff --git a/setup/applicationinstaller.class.inc.php b/setup/applicationinstaller.class.inc.php
index d0268baf2..760f21403 100644
--- a/setup/applicationinstaller.class.inc.php
+++ b/setup/applicationinstaller.class.inc.php
@@ -774,7 +774,9 @@ class ApplicationInstaller
 			
 		// try to make the final config file read-only
 		@chmod($sConfigFile, 0444); // Read-only for owner and group, nothing for others
+
 		// Ready to go !!
+		require_once(APPROOT.'core/dict.class.inc.php');
 		MetaModel::ResetCache($sTargetEnvironment);
 	}
 }