fix typo

diff --git a/dns/update.py b/dns/update.py
index 7cf13f687c6e636b05793cdb469c79abe067c778..b9911aebad14f5da40e64c5ca6b2d9e21dde94da 100644 (file)
--- a/dns/update.py
+++ b/dns/update.py
@@ -199,7 +199,7 @@ class Update(dns.message.Message):
         elif isinstance(args[0], dns.rdataset.Rdataset) or \
              isinstance(args[0], dns.rdata.Rdata) or \
              len(args) > 1:
-            if not isinstance(args[0], dns.rdata.Rdataset):
+            if not isinstance(args[0], dns.rdataset.Rdataset):
                 # Add a 0 TTL
                 args = list(args)
                 args.insert(0, 0)