diff --git a/.gitignore b/.gitignore
index e4a6ac3..d53e4c7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 /chrony-4.0.tar.gz
 /chrony-4.0-tar-gz-asc.txt
-/clknetsim-c4ccc2.tar.gz
+/clknetsim-1ca4a9.tar.gz
diff --git a/chrony.spec b/chrony.spec
index ef092b6..e26f14e 100644
--- a/chrony.spec
+++ b/chrony.spec
@@ -1,5 +1,5 @@
 %global _hardened_build 1
-%global clknetsim_ver c4ccc2
+%global clknetsim_ver 1ca4a9
 %bcond_without debug
 %bcond_without nts
 
@@ -90,11 +90,6 @@ rm -f getdate.c
 mv clknetsim-%{clknetsim_ver}* test/simulation/clknetsim
 
 %build
-# This package fails its testsuite when LTO is enabled on s390x
-# Disable LTO for now
-%ifarch s390x
-%define _lto_cflags %{nil}
-%endif
 %configure \
 %{?with_debug: --enable-debug} \
         --enable-ntp-signd \
diff --git a/sources b/sources
index 96eabab..3a81e73 100644
--- a/sources
+++ b/sources
@@ -1,3 +1,3 @@
 SHA512 (chrony-4.0.tar.gz) = a1c11a386c43f495910f7f2e9b5fbb1652c3631471d182b9b8203dfef98611d11535ad547a879856551263aed0ae2e30e4135b8ed89553684706166bc1c725c9
 SHA512 (chrony-4.0-tar-gz-asc.txt) = c3156d91f4fdb6f9e2fdbc83b1399afb0ecdfa9b7bc92648c5bce477c3f0f921d2a13aa21ac6c281f18b008c60f08e3db6d82b642b646f064aea1dbe19295c4c
-SHA512 (clknetsim-c4ccc2.tar.gz) = d2f71b2036e33ee92cd3590079dac04bc57bf2e9909f11e9ba66cd61c9946e92d2ebbdfd03c359cf39c6c8c07b28557d35fee3cb57eec75f5b1201858aa1d701
+SHA512 (clknetsim-1ca4a9.tar.gz) = 23c74ad9eadd3e09209bf0826901fefb1d11d210a882e15e83f0ef5903ea3d3fdce6859ac2cd9021485aef9d6771a609aa339af9ce4448522605c88b512c8943