-diff --git a/sys_linux.c b/sys_linux.c
-index 898dc7a7f75..fcd334ecf03 100644
---- a/sys_linux.c
-+++ b/sys_linux.c
-@@ -503,7 +503,7 @@ SYS_Linux_EnableSystemCallFilter(int level)
- SCMP_SYS(socketcall),
- /* General I/O */
- SCMP_SYS(_newselect), SCMP_SYS(close), SCMP_SYS(open), SCMP_SYS(openat), SCMP_SYS(pipe),
-- SCMP_SYS(pipe2), SCMP_SYS(poll), SCMP_SYS(ppoll), SCMP_SYS(pselect6), SCMP_SYS(read),
-+ SCMP_SYS(pipe2), SCMP_SYS(poll), SCMP_SYS(pselect6), SCMP_SYS(read),
- SCMP_SYS(futex), SCMP_SYS(select), SCMP_SYS(set_robust_list), SCMP_SYS(write),
- /* Miscellaneous */
- SCMP_SYS(getrandom), SCMP_SYS(sysinfo), SCMP_SYS(uname),
+diff -ur chrony-4.1.orig/sys_linux.c chrony-4.1/sys_linux.c
+--- chrony-4.1.orig/sys_linux.c 2021-05-12 13:06:15.000000000 +0200
++++ chrony-4.1/sys_linux.c 2021-09-18 13:01:17.378223193 +0200
+@@ -591,7 +591,6 @@
+ SCMP_SYS(pipe),
+ SCMP_SYS(pipe2),
+ SCMP_SYS(poll),
+- SCMP_SYS(ppoll),
+ #ifdef __NR_ppoll_time64
+ SCMP_SYS(ppoll_time64),
+ #endif