diff --git a/examples/bench/server.py b/examples/bench/server.py
index 6d00b46..ae306ef 100644
--- a/examples/bench/server.py
+++ b/examples/bench/server.py
@@ -108,7 +108,7 @@ if __name__ == '__main__':
         srv = loop.run_until_complete(coro)
     else:
         print('using sock_recv/sock_sendall')
-        loop.create_task(echo_server(loop, addr), unix)
+        loop.create_task(echo_server(loop, addr, unix))
     try:
         loop.run_forever()
     finally: