diff --git a/ChangeLog b/ChangeLog
index 42cdab2e22..90ce9eb1a1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Apr  7 10:41:30 2013  Tanaka Akira  <akr@fsij.org>
+
+	* lib/resolv.rb (MDNSOneShot#sender): Delete an unused variable.
+
 Sun Apr  7 03:24:36 2013  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* addr2line.c: use more generic type:
diff --git a/lib/resolv.rb b/lib/resolv.rb
index bdbed2702a..04b85ea85d 100644
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@@ -831,7 +831,6 @@ class Resolv
 
       class MDNSOneShot < UnconnectedUDP # :nodoc:
         def sender(msg, data, host, port=Port)
-          service = [host, port]
           id = DNS.allocate_request_id(host, port)
           request = msg.encode
           request[0,2] = [id].pack('n')