Submitted upstream at:
http://lists.gnu.org/archive/html/bug-inetutils/2016-10/msg00000.html

diff -u -r ../inetutils-1.9.4/ftp/cmds.c ./ftp/cmds.c
--- ../inetutils-1.9.4/ftp/cmds.c	2015-06-09 03:41:47.000000000 -0400
+++ ./ftp/cmds.c	2016-10-22 08:13:16.282265064 -0400
@@ -1721,6 +1721,9 @@
 void
 user (int argc, char **argv)
 {
+# if !HAVE_DECL_GETPASS
+  extern char *getpass ();
+# endif
   char acct[80];
   int n, aflag = 0;
 
@@ -2070,6 +2073,9 @@
 void
 account (int argc, char **argv)
 {
+# if !HAVE_DECL_GETPASS
+  extern char *getpass ();
+# endif
   char acct[50], *ap;
 
   if (argc > 1)
diff -u -r ../inetutils-1.9.4/ftp/ftp.c ./ftp/ftp.c
--- ../inetutils-1.9.4/ftp/ftp.c	2015-03-31 11:40:47.000000000 -0400
+++ ./ftp/ftp.c	2016-10-22 08:13:37.005945253 -0400
@@ -292,6 +292,9 @@
 int
 login (char *host)
 {
+# if !HAVE_DECL_GETPASS
+  extern char *getpass ();
+# endif
   char tmp[80];
   char *user, *pass, *acct;
   int n, aflag = 0;