diff --git a/surveillance/deconnexion.py b/surveillance/deconnexion.py
index 142e0667..82a94aea 100755
--- a/surveillance/deconnexion.py
+++ b/surveillance/deconnexion.py
@@ -20,6 +20,7 @@ from time import *
 
 from gestion.config import NETs, plage_ens, prefix
 from gestion.config import upload as upload
+import gestion.config.encoding
 import gestion.config.mails.upload as mails_upload
 from gestion.ldap_crans import crans_ldap
 from gestion.ldap_crans import MachineFixe
@@ -79,8 +80,17 @@ def reperage_chambre(mac):
 ################################################################################
 
 # upload par entité (adhérent/club/machine crans)
-requete="""SELECT
-    SUM(agregat.total) as tot_upload, machines.type, machines.id
+requete="""WITH
+    machines_sans_doublon
+AS
+    (
+        SELECT DISTINCT ON(mac_addr)
+            *
+        FROM
+            machines
+    )
+SELECT
+    SUM(agregat.total) as tot_upload, machines_sans_doublon.type, machines_sans_doublon.id
 FROM (
     SELECT
         'upload', sum(bytes)/1024/1024 AS total, mac_src
@@ -109,11 +119,11 @@ FROM (
         mac_src
     ) AS agregat
 INNER JOIN
-    machines
+    machines_sans_doublon
 ON
-    machines.mac_addr = agregat.mac_src
+    machines_sans_doublon.mac_addr = agregat.mac_src
 GROUP BY
-    machines.type, machines.id
+    machines_sans_doublon.type, machines_sans_doublon.id
 ORDER BY
     tot_upload;
 """