diff --git a/less-418-fsync.patch b/less-418-fsync.patch
deleted file mode 100644
index 5288fb2..0000000
--- a/less-418-fsync.patch
+++ /dev/null
@@ -1,38 +0,0 @@
-diff -ur less-418.orig/configure.ac less-418/configure.ac
---- less-418.orig/configure.ac	2008-12-22 07:10:44.000000000 -0500
-+++ less-418/configure.ac	2008-12-22 07:28:58.000000000 -0500
-@@ -203,6 +203,8 @@
- 	[Define HAVE_TIME_T if your system supports the "time_t" type.])
- AH_TEMPLATE([HAVE_STRERROR],
- 	[Define HAVE_STRERROR if you have the strerror() function.])
-+AH_TEMPLATE([HAVE_FSYNC],
-+	[Define HAVE_FSYNC if fsync() on a tty works.])
- AH_TEMPLATE([HAVE_FILENO],
- 	[Define HAVE_FILENO if you have the fileno() macro.])
- AH_TEMPLATE([HAVE_ERRNO],
-@@ -251,7 +253,7 @@
- 
- # Checks for library functions.
- AC_TYPE_SIGNAL
--AC_CHECK_FUNCS([fsync popen _setjmp sigprocmask sigsetmask snprintf stat system fchmod realpath])
-+AC_CHECK_FUNCS([popen _setjmp sigprocmask sigsetmask snprintf stat system fchmod realpath])
- 
- # AC_CHECK_FUNCS may not work for inline functions, so test these separately.
- AC_MSG_CHECKING(for memcpy)
-@@ -298,6 +300,16 @@
- #endif], [static char *x; x = strerror(0);],
-   [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_STRERROR)], [AC_MSG_RESULT(no)])
- 
-+AC_MSG_CHECKING(for fsync)
-+AC_TRY_RUN([
-+#include <fcntl.h>
-+#include <unistd.h>
-+int main(void)
-+{
-+        int fd = open("/dev/tty", O_RDWR);
-+        return fsync(fd);
-+}], [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_FSYNC)], [AC_MSG_RESULT(no)])
-+
- AC_MSG_CHECKING(for sys_errlist)
- AC_TRY_LINK(, [extern char *sys_errlist[]; static char **x; x = sys_errlist;], 
-   [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_SYS_ERRLIST)], [AC_MSG_RESULT(no)])
diff --git a/less-475-fsync.patch b/less-475-fsync.patch
new file mode 100644
index 0000000..61dd45c
--- /dev/null
+++ b/less-475-fsync.patch
@@ -0,0 +1,64 @@
+From 5396b6b77d0248678f716038dc747d6898acb0b3 Mon Sep 17 00:00:00 2001
+From: Stephen Gallagher <sgallagh@redhat.com>
+Date: Fri, 22 Jan 2021 09:49:13 -0500
+Subject: [PATCH] Test for fsync on tty
+
+Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>
+---
+ configure.ac | 14 +++++++++++++-
+ 1 file changed, 13 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index 918807967473e01af6c5d78b1737c2d06f96b426..ce478adc1ea2d37c2b22eb46fc2b55d2ba49244e 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -219,10 +219,12 @@ AH_TEMPLATE([HAVE_STAT_INO],
+ 	[Define HAVE_STAT_INO if your struct stat has st_ino and st_dev.])
+ AH_TEMPLATE([HAVE_TIME_T],
+ 	[Define HAVE_TIME_T if your system supports the "time_t" type.])
+ AH_TEMPLATE([HAVE_STRERROR],
+ 	[Define HAVE_STRERROR if you have the strerror() function.])
++AH_TEMPLATE([HAVE_FSYNC],
++	[Define HAVE_FSYNC if fsync() on a tty works.])
+ AH_TEMPLATE([HAVE_FILENO],
+ 	[Define HAVE_FILENO if you have the fileno() macro.])
+ AH_TEMPLATE([HAVE_ERRNO],
+ 	[Define HAVE_ERRNO if you have the errno variable.])
+ AH_TEMPLATE([MUST_DEFINE_ERRNO],
+@@ -272,11 +274,11 @@ AC_MSG_CHECKING(for ANSI function prototypes)
+ AC_TRY_COMPILE([], [int f(int a) { return a; }],
+   [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_ANSI_PROTOS)], [AC_MSG_RESULT(no)])
+ 
+ # Checks for library functions.
+ AC_TYPE_SIGNAL
+-AC_CHECK_FUNCS([fchmod fsync nanosleep poll popen realpath _setjmp sigprocmask sigsetmask snprintf stat system usleep])
++AC_CHECK_FUNCS([fchmod nanosleep poll popen realpath _setjmp sigprocmask sigsetmask snprintf stat system usleep])
+ 
+ # AC_CHECK_FUNCS may not work for inline functions, so test these separately.
+ AC_MSG_CHECKING(for memcpy)
+ AC_TRY_LINK([
+ #if HAVE_STRING_H
+@@ -319,10 +321,20 @@ AC_TRY_LINK([
+ #if HAVE_ERRNO_H
+ #include <errno.h>
+ #endif], [static char *x; x = strerror(0);],
+   [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_STRERROR)], [AC_MSG_RESULT(no)])
+ 
++AC_MSG_CHECKING(for fsync)
++AC_TRY_RUN([
++#include <fcntl.h>
++#include <unistd.h>
++int main(void)
++{
++        int fd = open("/dev/tty", O_RDWR);
++        return fsync(fd);
++}], [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_FSYNC)], [AC_MSG_RESULT(no)])
++
+ AC_MSG_CHECKING(for sys_errlist)
+ AC_TRY_LINK(, [extern char *sys_errlist[]; static char **x; x = sys_errlist;], 
+   [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_SYS_ERRLIST)], [AC_MSG_RESULT(no)])
+ 
+ AC_CHECK_TYPES([sigset_t],,,[#include <signal.h>])
+-- 
+2.29.2
+
diff --git a/less.spec b/less.spec
index 6a7e922..5df9b23 100644
--- a/less.spec
+++ b/less.spec
@@ -1,6 +1,6 @@
 Summary: A text file browser similar to more, but better
 Name: less
-Version: 568
+Version: 575
 Release: 1%{?dist}
 License: GPLv3+ or BSD
 Source0: https://www.greenwoodsoftware.com/less/%{name}-%{version}.tar.gz
@@ -8,7 +8,7 @@ Source1: lesspipe.sh
 Source2: less.sh
 Source3: less.csh
 Patch4: less-394-time.patch
-Patch5: less-418-fsync.patch
+Patch5: less-475-fsync.patch
 Patch6: less-436-manpage-add-old-bot-option.patch
 Patch7: less-436-help.patch
 Patch8: less-458-lessecho-usage.patch
@@ -63,6 +63,9 @@ install -p -m 644 %{SOURCE3} $RPM_BUILD_ROOT/etc/profile.d
 %{_mandir}/man1/*
 
 %changelog
+* Fri Jan 22 2021 Stephen Gallagher <sgallagh@redhat.com> - 575-1
+- Update to latest version (#1919119)
+
 * Mon Nov 30 2020 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> - 568-1
 - Update to latest version (#1818534)