diff --git a/htdocs/lib/security.lib.php b/htdocs/lib/security.lib.php
index ec2284f2f3e..a022a2e4f6f 100644
--- a/htdocs/lib/security.lib.php
+++ b/htdocs/lib/security.lib.php
@@ -159,7 +159,14 @@ function dol_loginfunction($langs,$conf,$mysoc)
 	{
 		$rowspan++;
 
-		$res=@include_once(DOL_DOCUMENT_ROOT.'/multicompany/class/actions_multicompany.class.php');
+		if(file_exists(DOL_DOCUMENT_ROOT.'/multicompany/class/actions_multicompany.class.php'))
+		{
+			$res=@include_once(DOL_DOCUMENT_ROOT.'/multicompany/class/actions_multicompany.class.php');
+		}
+		else
+		{
+			$res=@include_once(DOL_DOCUMENT_EXTMODULE.'/multicompany/class/actions_multicompany.class.php');
+		}
 		if ($res)
 		{
 			$mc = new ActionsMulticompany($db);