diff --git a/confluent_server/confluent/discovery/core.py b/confluent_server/confluent/discovery/core.py
index 11e25666..6a256114 100644
--- a/confluent_server/confluent/discovery/core.py
+++ b/confluent_server/confluent/discovery/core.py
@@ -448,7 +448,7 @@ def detected(info):
     else:  # no nodehandler, ignore for now
         return
     try:
-        snum = info['attributes']['enclosure-serial-number'][0].rstrip()
+        snum = info['attributes']['enclosure-serial-number'][0].strip()
         if snum:
             info['serialnumber'] = snum
             known_serials[info['serialnumber']] = info