diff --git a/htdocs/comm/index.php b/htdocs/comm/index.php
index 8febd1358a2..b52096d00f9 100644
--- a/htdocs/comm/index.php
+++ b/htdocs/comm/index.php
@@ -26,12 +26,24 @@
  */
 
 require("../main.inc.php");
-require_once("html.formfile.class.php");
-require_once("client.class.php");
-if ($conf->contrat->enabled) require_once(DOL_DOCUMENT_ROOT."/contrat/contrat.class.php");
-if ($conf->propal->enabled)  require_once(DOL_DOCUMENT_ROOT."/comm/propal/propal.class.php");
-require_once("actioncomm.class.php");
-require_once("agenda.lib.php");
+if (! empty($dolibarr_allow_overwritekernel))
+{
+	require_once("html.formfile.class.php");
+	require_once("client.class.php");
+	require_once("actioncomm.class.php");
+	require_once("agenda.lib.php");
+	if ($conf->contrat->enabled) require_once("contrat/contrat.class.php");
+	if ($conf->propal->enabled)  require_once("comm/propal/propal.class.php");
+}
+else
+{
+	require_once(DOL_DOCUMENT_ROOT."/html.formfile.class.php");
+	require_once(DOL_DOCUMENT_ROOT."/client.class.php");
+	require_once(DOL_DOCUMENT_ROOT."/actioncomm.class.php");
+	require_once(DOL_DOCUMENT_ROOT."/agenda.lib.php");
+	if ($conf->contrat->enabled) require_once(DOL_DOCUMENT_ROOT."/contrat/contrat.class.php");
+	if ($conf->propal->enabled)  require_once(DOL_DOCUMENT_ROOT."/comm/propal/propal.class.php");
+}
 
 if (!$user->rights->societe->lire)
 accessforbidden();