diff --git a/dnsping.py b/dnsping.py
index cd38d1c..7d9cfc2 100755
--- a/dnsping.py
+++ b/dnsping.py
@@ -168,7 +168,7 @@ def main():
             break
         try:
             stime = time.time()
-            answers = resolver.query(hostname, dnsrecord, source_port=src_port, source=src_ip, tcp=use_tcp, af=af,
+            answers = resolver.query(hostname, dnsrecord, source_port=src_port, source=src_ip, tcp=use_tcp,
                                      raise_on_no_answer=False)
             etime = time.time()
         except dns.resolver.NoNameservers as e: