diff --git a/gestion/chambres_vides.py b/gestion/chambres_vides.py
index e1f6eee6..369d9e9c 100755
--- a/gestion/chambres_vides.py
+++ b/gestion/chambres_vides.py
@@ -103,7 +103,7 @@ if __name__ == '__main__':
     if periode_transitoire:
         date = to_gtf(debut_periode_transitoire)
     else:
-        date = now.strftime(FORMAT_LDAP) + 'z'
+        date = now.strftime(FORMAT_LDAP) + 'Z'
 
     bad_boys_e_s = conn.search(FILTER % {'date': date})