diff --git a/gestion/darcs_send_changes.py b/gestion/darcs_send_changes.py
index 6c0464bc..09c77efc 100755
--- a/gestion/darcs_send_changes.py
+++ b/gestion/darcs_send_changes.py
@@ -43,6 +43,10 @@ from email.MIMEText import MIMEText
 from email.Utils import formatdate
 from email import Encoders
 
+CONF_PATH = "_darcs/third-party/darcs-send-changes"
+LAST_SEEN_FILE = CONF_PATH + "/last-seen"
+ID_FILE = CONF_PATH + "/id"
+
 def to_utf8(str):
     """ Decode un str ou un unicode vers un str en UTF-8. """
     if isinstance(str, unicode):
@@ -73,9 +77,17 @@ def get_patch_properties(hash):
     diff = darcs("diff %s --unified" % match_cmd)
     diff = diff[diff.find('\ndiff ')+1:]
     cwd = os.getcwd()
+    hostname = commands.getoutput('hostname -s')
+    shortrepo = os.path.basename(cwd)
+    if os.path.exists(ID_FILE):
+        id = file(ID_FILE).read()
+    else:
+        id = shortrepo
     return { 'author': prop.attrib['author'],
-             'repo': "%s:%s" % (commands.getoutput('hostname -s'), cwd),
-             'shortrepo': os.path.basename(cwd),
+             'hostname': hostname,
+             'id': id,
+             'repo': "%s:%s" % (hostname, cwd),
+             'shortrepo': shortrepo,
              'date': prop.attrib['local_date'],
              'hash': prop.attrib['hash'],
              'name': prop.findtext('name'),
@@ -93,9 +105,6 @@ def get_patches_properties(from_hash):
         props.append(get_patch_properties(change.attrib['hash']))
     return props
 
-CONF_PATH = "_darcs/third-party/darcs-send-changes"
-LAST_SEEN_FILE = CONF_PATH + "/last-seen"
-
 def send_changes(smtp, recipient, patch_props):
     """ Formate et envoie un mail avec les modifications sur le dernier
 patch appliqué au dépot.
@@ -111,7 +120,7 @@ contenir les variables suivantes:
 * recipient: les destinataires du mail
 """
     from_template = "%(author)s"
-    subject_template = "Darcs record (%(shortrepo)s): %(name)s"
+    subject_template = "Darcs record (%(id)s): %(name)s"
     message_template = "%(changes)s"
     diff_template = "%(diff)s"