diff --git a/bin/packages/Paste.py b/bin/packages/Paste.py
index ccaf3400..317743f4 100755
--- a/bin/packages/Paste.py
+++ b/bin/packages/Paste.py
@@ -340,7 +340,7 @@ class Paste(object):
         Save a new duplicate on others pastes
         """
         for hash_type, path, percent, date in list_value:
-            to_add = [hash_type, self.p_path, percent, date]
+            to_add = (hash_type, self.p_path, percent, date)
             self.store_duplicate.sadd('dup:'+path,to_add)
 
     def _get_from_redis(self, r_serv):