Index: lib/net/ftp.rb
===================================================================
--- lib/net/ftp.rb	(Revision 17856)
+++ lib/net/ftp.rb	(Arbeitskopie)
@@ -279,7 +279,7 @@
       af = (@sock.peeraddr)[0]
       if af == "AF_INET"
 	hbytes = host.split(".")
-	pbytes = [port / 256, port % 256]
+	pbytes = [port.div(256), port % 256]
 	bytes = hbytes + pbytes
 	cmd = "PORT " + bytes.join(",")
       elsif af == "AF_INET6"