diff --git a/backport-Undelete-usleep-nanosleep-ttyname-poll.patch b/backport-Undelete-usleep-nanosleep-ttyname-poll.patch
new file mode 100644
index 0000000000000000000000000000000000000000..070c24de9f8056edcdbb01945d917aa80ebbaa3d
--- /dev/null
+++ b/backport-Undelete-usleep-nanosleep-ttyname-poll.patch
@@ -0,0 +1,25 @@
+From a1253db65213beb0edbf8fa4ab2de9cec729bd2b Mon Sep 17 00:00:00 2001
+From: rpm-build <rpm-build>
+Date: Tue, 2 Apr 2024 14:56:55 +0800
+Subject: [PATCH] Undelete usleep,nanosleep,ttyname,poll
+
+---
+ configure.ac | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index f0b71e1..52c5f90 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -276,7 +276,7 @@ AC_TRY_COMPILE([], [int f(int a) { return a; }],
+ 
+ # Checks for library functions.
+ AC_TYPE_SIGNAL
+-AC_CHECK_FUNCS([popen _setjmp sigprocmask sigsetmask snprintf stat system fchmod realpath])
++AC_CHECK_FUNCS([fchmod nanosleep poll popen realpath _setjmp sigprocmask sigsetmask snprintf stat system ttyname usleep])
+ 
+ # AC_CHECK_FUNCS may not work for inline functions, so test these separately.
+ AC_MSG_CHECKING(for memcpy)
+-- 
+2.33.0
+
diff --git a/less.spec b/less.spec
index 34baca5438bcf5479531c186b13fd78774013200..12864dd1ebb671473759ae0780a61a88c65a7928 100644
--- a/less.spec
+++ b/less.spec
@@ -1,6 +1,6 @@
 Name:		less
 Version:	590
-Release:        3
+Release:        4
 Summary:	Less is a pager that displays text files.
 License:	GPLv3+ or BSD
 URL:		http://www.greenwoodsoftware.com/less
@@ -9,6 +9,7 @@ Patch0:		less-394-time.patch
 Patch1:		less-475-fsync.patch
 Patch2:		backport-End-OSC8-hyperlink-on-invalid-embedded-escape-sequen.patch
 Patch3:		backport-Shell-quote-filenames-when-invoking-LESSCLOSE.patch
+Patch4:		backport-Undelete-usleep-nanosleep-ttyname-poll.patch
 
 BuildRequires:	git gcc make ncurses-devel autoconf automake libtool
 
@@ -47,6 +48,9 @@ autoreconf -ivf
 %{_mandir}/man1/*
 
 %changelog
+* Tue Apr 02 2024 yinyongkang <yinyongkang@kylinos.cn> - 590-4
+- Undelete usleep,nanosleep,ttyname,poll
+
 * Mon Feb 19 2024 liweigang <izmirvii@gmail.com> - 590-3
 - fix CVE-2022-48624