diff --git a/packet-queue.rb b/packet-queue.rb
index 265b8f2..0a28245 100644
--- a/packet-queue.rb
+++ b/packet-queue.rb
@@ -24,7 +24,9 @@ class PacketQueue
 
 
   def initialize
-    @packets = Hash.new { Array.new }
+    @packets = Hash.new do | hash, key |
+      hash[ key ] = Array.new
+    end
   end
 end
 
diff --git a/simple-router.rb b/simple-router.rb
index ebf1bb6..b4e9c66 100644
--- a/simple-router.rb
+++ b/simple-router.rb
@@ -79,7 +79,7 @@ def handle_arp_request( dpid, message )
   def handle_arp_reply( dpid, message )
     @arp_table.update( message.in_port, message.arp_spa, message.arp_sha )
     @unresolved_packets[ message.arp_spa.to_i ].each do | each |
-      info "under development"
+      handle_ipv4( dpid, each )
     end
   end
 
@@ -169,7 +169,6 @@ def send_packet( dpid, packet, interface )
   def handle_unresolved_packet( dpid, message, interface, ipaddr )
     packet = create_arp_request( interface, ipaddr )
     send_packet( dpid, packet, interface )
-    # under development
     @unresolved_packets[ ipaddr.to_i ] << message
   end