diff -up netkit-ftp-0.17/ftp/cmds.c.old netkit-ftp-0.17/ftp/cmds.c

--- netkit-ftp-0.17/ftp/cmds.c.old	2007-10-17 16:28:57.000000000 +0200

+++ netkit-ftp-0.17/ftp/cmds.c	2007-10-17 16:33:41.000000000 +0200

@@ -764,6 +764,7 @@ usage:

 	recvrequest("RETR", argv[2], argv[1], modestr,

 		    argv[1] != oldargv1 || argv[2] != oldargv2);

+	(void) close(data), data = -1;

 	restart_point = 0;

 	return (0);

 }