diff --git a/utils/check_mid.py b/utils/check_mid.py
new file mode 100755
index 00000000..9c27276c
--- /dev/null
+++ b/utils/check_mid.py
@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+# -*- encoding: utf-8 -*-
+#
+# CHECK_MID.PY -- Vérification et application de la correspondance mid <-> IP
+#
+# Copyright (c) 2010 Nicolas Dandrimont
+# Authors: Nicolas Dandrimont <olasd@crans.org>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import sys
+sys.path.append('/usr/scripts/gestion')
+
+from midtools import Mid
+from ldap_crans import crans_ldap
+
+from optparse import OptionParser
+
+def check_mid(normalize):
+    """Vérifie que les mid correspondent bien aux IP.
+
+    Si normalize = True, modifie la base pour que la correspondance
+    soit bien vérifiée"""
+    cl = crans_ldap()
+
+    counter = 0
+    s = cl.search("ipHostNumber=*")
+    for m in s["machine"]:
+        counter += 1
+        mid = int(m.id())
+        ip = m.ip()
+        try:
+            mid_t = Mid(ipv4=ip)
+        except ValueError, e:
+            print e
+        else:
+            if mid != int(mid_t):
+                print "%s: %s!=%s" % (m.Nom(), mid, int(mid_t))
+                if normalize:
+                    m.conn.rename_s(m.dn, "%s=%d" % (m.idn, mid_t))
+    print counter
+
+if __name__ == "__main__":
+    parser = OptionParser()
+    parser.set_defaults(normalize=False)
+    parser.add_option("-n", "--normalize", action="store_true", help="Modifie les mid pour les faire conformer au schema")
+    
+    (options, args) = parser.parse_args()
+    
+    check_mid(options.normalize)