diff --git a/server/web2py/applications/vidjil/controllers/default.py b/server/web2py/applications/vidjil/controllers/default.py
index 01c662e73c3beec70277d90b3184a513b414d102..6281a681615154671500bfe2f830c691ba54ed53 100644
--- a/server/web2py/applications/vidjil/controllers/default.py
+++ b/server/web2py/applications/vidjil/controllers/default.py
@@ -135,7 +135,7 @@ def run_request():
     if not enough_space:
         mail.send(to=defs.ADMIN_EMAILS,
             subject="[Vidjil] Server space",
-            message="The space in directory %s has passed below %d\%." % (defs.DIR_RESULTS, defs.FS_LOCK_THRESHHOLD))
+            message="The space in directory %s has passed below %d%%." % (defs.DIR_RESULTS, defs.FS_LOCK_THRESHHOLD))
         return error_message("Runs are temporarily disabled. System admins have been made aware of the situation.")
 
     ##TODO check