diff --git a/schema/eole.schema b/schema/eole.schema
index 1fdb096..ae2834f 100644
--- a/schema/eole.schema
+++ b/schema/eole.schema
@@ -261,7 +261,8 @@ objectclass ( 2.16.840.1.113732.3.1.37
     SUP top AUXILIARY
     MUST ( typeadmin $ codecivilite )
     MAY ( dateNaissance $ mailDir $ mailHost $ intid
-         $ FederationKey $ Divcod $ ManagedGroup $ LastUpdate )
+         $ FederationKey $ Divcod $ ManagedGroup $ LastUpdate
+         $ mailAlternateAddress )
     )
 
 objectclass ( 2.16.840.1.113732.3.1.38