diff --git a/gestion/ldap_crans.py b/gestion/ldap_crans.py
index 9fd6d1d4..52c6501e 100644
--- a/gestion/ldap_crans.py
+++ b/gestion/ldap_crans.py
@@ -1748,6 +1748,20 @@ class BaseProprietaire(BaseClasseCrans):
         if 'chbre' in self.modifs and '????' in [ self._init_data.get("chbre", [''])[0] ,  self._init_data.get("chbre", [''])[0] ]:
             self.services_to_restart('bl_chbre_invalide')
 
+        if 'chbre' in self.modifs:
+            while True:
+                bat = self._data['chbre'][0][0]
+                ch = self._data['chbre'][0][1:]
+                if annuaires.is_crans(bat, ch):
+                    break
+                else:
+                    r = prompt(u"La chambre %s est câblée sur le réseau CROUS. Est-ce *bien* la chambre de l'adhérent ? [O/N]" % self._data['chbre'][0], "O")
+                    if r == 'O' or r == 'o':
+                        annuaires.crous_to_crans(bat, ch)
+                    else:
+                        new_ch = prompt(u"Chambre de l'adhérent ?")
+                        self.chbre(new_ch)
+
         # Enregistrement
         self._save()