add missing import to trio example

diff --git a/examples/trio.py b/examples/trio.py
index bed8c0daa34bb1f2ab3079d2c150df5f799df382..4f65e440cce3a30eaf6fda1312431be40c8ab9bf 100644 (file)
--- a/examples/trio.py
+++ b/examples/trio.py
@@ -4,6 +4,7 @@ import trio
 
 import dns.message
 import dns.trio.query
+import dns.trio.resolver
 
 async def main():
     if len(sys.argv) > 1: