diff --git a/appl/popper/pop_xmit.c b/appl/popper/pop_xmit.c
index 8bd9e2366..c5ed839fe 100644
--- a/appl/popper/pop_xmit.c
+++ b/appl/popper/pop_xmit.c
@@ -12,6 +12,9 @@ static char SccsId[] = "@(#)@(#)pop_xmit.c	2.1  2.1 3/18/91";
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/file.h>
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif /* HAVE_SYS_RESOURCE_H */
 #include <sys/wait.h>
 #include <fcntl.h>
 #include "popper.h"
diff --git a/appl/telnet/configure.in b/appl/telnet/configure.in
index 5f06775dd..4f2afc21e 100644
--- a/appl/telnet/configure.in
+++ b/appl/telnet/configure.in
@@ -174,7 +174,7 @@ AC_CHECK_LIB(util, logout)
 
 AC_SUBST(HAVE_LIBTERMCAP)
 
-AC_CHECK_HEADERS(termios.h termio.h sys/select.h utmpx.h sac.h)
+AC_CHECK_HEADERS(termios.h termio.h sys/select.h sys/resource.h utmpx.h sac.h)
 
 if test "$ac_cv_header_sac_h" = yes ; then
 	AC_DEFINE(STREAMSPTY)
diff --git a/appl/telnet/telnetd/defs.h b/appl/telnet/telnetd/defs.h
index a73d4a619..8c1905d49 100644
--- a/appl/telnet/telnetd/defs.h
+++ b/appl/telnet/telnetd/defs.h
@@ -71,6 +71,9 @@
 #endif
 
 #include <sys/socket.h>
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif /* HAVE_SYS_RESOURCE_H */
 #ifndef	CRAY
 #include <sys/wait.h>
 #endif	/* CRAY */