diff --git a/product/ERP5Type/Base.py b/product/ERP5Type/Base.py
index 9775b9d64c50050a551a1addbb8a073013d20f2a..4e2e920b1faded309e36cb5aed66375fa010a99c 100644
--- a/product/ERP5Type/Base.py
+++ b/product/ERP5Type/Base.py
@@ -3115,6 +3115,9 @@ class Base( CopyContainer,
   def updateRoleMappingsFor(self, wf_id, **kw):
     """
     Update security policy according to workflow settings given by wf_id
+      
+    There's no check that the document is actually chained to the workflow,
+    it's caller responsability to perform this check.
     """
     workflow = self.portal_workflow.getWorkflowById(wf_id)
     if workflow is not None: