diff --git a/gcc.spec b/gcc.spec
index 70bcb70..3923908 100644
--- a/gcc.spec
+++ b/gcc.spec
@@ -4,7 +4,7 @@
 %global gcc_major 14
 # Note, gcc_release must be integer, if you want to add suffixes to
 # %%{release}, append them after %%{gcc_release} on Release: line.
-%global gcc_release 7
+%global gcc_release 8
 %global nvptx_tools_gitrev 87ce9dc5999e5fca2e1d3478a30888d9864c9804
 %global newlib_cygwin_gitrev d45261f62a15f8abd94a1031020b9a9f455e4eed
 %global _unpackaged_files_terminate_build 0
@@ -1230,7 +1230,9 @@ CONFIGURE_OPTS="\
 %if 0%{?rhel} >= 7
 %if 0%{?rhel} > 7
 %if 0%{?rhel} > 8
-%if 0%{?rhel} >= 9
+%if 0%{?rhel} >= 10
+	--with-arch=z14 --with-tune=z16 \
+%elif 0%{?rhel} >= 9
 	--with-arch=z14 --with-tune=z15 \
 %else
 	--with-arch=z13 --with-tune=arch13 \
@@ -3620,6 +3622,9 @@ end
 %endif
 
 %changelog
+* Mon May 26 2025 Siddhesh Poyarekar <siddhesh@redhat.com> 14.2.1-8
+- Tune for z16 on s390x by default on RHEL10 and later (RHEL-86679)
+
 * Tue Jan 21 2025 Marek Polacek <polacek@redhat.com> 14.2.1-7
 - update from releases/gcc-14 branch (RHEL-65532)
   - PRs ada/113036, ada/113868, ada/115917, ada/117328, ada/117996,