diff --git a/htdocs/user/class/user.class.php b/htdocs/user/class/user.class.php
index 4459dfc3fc0..0a03e47fca4 100644
--- a/htdocs/user/class/user.class.php
+++ b/htdocs/user/class/user.class.php
@@ -262,6 +262,10 @@ class User extends CommonObject
 				$this->fk_member            = $obj->fk_member;
 				$this->fk_user        		= $obj->fk_user;
 
+				// Protection when module multicompany was set, admin was set to first entity and the module disabled,
+				// then this admin user must be admin for all entities.
+				if (empty($conf->multicompany->enabled) && $this->admin && $this->entity == 1) $this->entity = 0; 
+				
 				// Retreive all extrafield for thirdparty
 				// fetch optionals attributes and labels
 				require_once(DOL_DOCUMENT_ROOT.'/core/class/extrafields.class.php');