--- /dev/null
+From 26d01bdb26f1c7487ad4ba0151221dfe28cd878d Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Wed, 15 Jul 2020 21:19:14 +0200
+Subject: [PATCH] programs/util.c: fix build without st_mtime
+
+Since version 1.4.5 and commit
+5af8cb7aea8d890b4801e50e5274371510f2cf33, if st_mtime is not defined,
+programs/util.c uses utime without including utime.h which will raise
+the following build failure on some of the buildroot autobuilders:
+
+util.c: In function 'UTIL_setFileStat':
+util.c:161:24: error: storage size of 'timebuf' isn't known
+ struct utimbuf timebuf;
+ ^~~~~~~
+
+Fixes:
+ - http://autobuild.buildroot.org/results/be902c5d110f37bce622a2215191f155b7d3e7e0
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+[Upstream status: https://github.com/facebook/zstd/pull/2246]
+---
+ programs/util.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/programs/util.c b/programs/util.c
+index a0d45745..2493a4ad 100644
+--- a/programs/util.c
++++ b/programs/util.c
+@@ -28,7 +28,7 @@ extern "C" {
+ # include <io.h> /* _chmod */
+ #else
+ # include <unistd.h> /* chown, stat */
+-# if PLATFORM_POSIX_VERSION < 200809L
++# if PLATFORM_POSIX_VERSION < 200809L || !defined(st_mtime)
+ # include <utime.h> /* utime */
+ # else
+ # include <fcntl.h> /* AT_FDCWD */
+--
+2.27.0
+