diff --git a/tangostationcontrol/tangostationcontrol/toolkit/archiver.py b/tangostationcontrol/tangostationcontrol/toolkit/archiver.py
index 237d45a5329361b6f0561e7203e5acf541180755..82a987fb0393f1420ddf925294927682ae83379b 100644
--- a/tangostationcontrol/tangostationcontrol/toolkit/archiver.py
+++ b/tangostationcontrol/tangostationcontrol/toolkit/archiver.py
@@ -117,7 +117,7 @@ class Archiver():
             load_dict = {}
             for es_name in es_list:
                 es = DeviceProxy(es_name)
-                load_dict[es_name]=float(es.AttributeRecordFreq)
+                load_dict[es_name]=float(es.AttributeRecordFreq or 0) 
             min_load = min(load_dict.values())
             # Return the subscriber's name with min load
             min_es = list(load_dict.keys())[list(load_dict.values()).index(min_load)]