import dns.rrset, since we use it

diff --git a/dns/zone.py b/dns/zone.py
index cdbd699881cb00e6891c843e9ea75b2329ed7c64..902ec1e88a85482b5f7dee6e64e8cf478a3f9cf7 100644 (file)
--- a/dns/zone.py
+++ b/dns/zone.py
@@ -25,6 +25,7 @@ import dns.node
 import dns.rdataclass
 import dns.rdatatype
 import dns.rdata
+import dns.rrset
 import dns.tokenizer
 import dns.ttl