diff --git a/configure.in b/configure.in
index 93b3b395d..0cdd6f28a 100644
--- a/configure.in
+++ b/configure.in
@@ -199,7 +199,8 @@ AC_DECL_YYTEXT
 dnl Checks for header files.
 AC_HEADER_STDC
 
-AC_CHECK_HEADERS(arpa/inet.h arpa/nameser.h arpa/telnet.h bsdsetjmp.h crypt.h)
+AC_CHECK_HEADERS(arpa/ftp.h arpa/inet.h arpa/nameser.h arpa/telnet.h )
+AC_CHECK_HEADERS(bsdsetjmp.h crypt.h)
 AC_CHECK_HEADERS(curses.h db.h dbm.h dirent.h err.h errno.h)
 AC_CHECK_HEADERS(fcntl.h fnmatch.h grp.h inttypes.h limits.h maillock.h ndbm.h)
 AC_CHECK_HEADERS(net/if.h netdb.h)