diff --git a/beem/steem.py b/beem/steem.py
index 1914a9923afbb348e5c3fc89e71070965e6146b4..af0b61614db90cf62a49443fab446220d4c24255 100644
--- a/beem/steem.py
+++ b/beem/steem.py
@@ -1508,7 +1508,8 @@ class Steem(object):
             PublicKey(signing_key, prefix=self.prefix)
         except Exception as e:
             raise e
-
+        if "sbd_interest_rate" in props:
+            props["sbd_interest_rate"] = Amount(props["sbd_interest_rate"], steem_instance=self)
         op = operations.Witness_update(
             **{
                 "owner": account["name"],