diff --git a/gcc-toolset-15-gcc.spec b/gcc-toolset-15-gcc.spec
index 8e287be..bf14ad3 100644
--- a/gcc-toolset-15-gcc.spec
+++ b/gcc-toolset-15-gcc.spec
@@ -171,7 +171,7 @@ BuildRequires: gcc-toolset-%{gts_ver}-devel
 Summary: GCC version %{gcc_major}
 Name: %{?scl_prefix}gcc
 Version: %{gcc_version}
-Release: %{gcc_release}.1%{?dist}
+Release: %{gcc_release}.2%{?dist}
 # License notes for some of the less obvious ones:
 #   gcc/doc/cppinternals.texi: Linux-man-pages-copyleft-2-para
 #   isl: MIT, BSD-2-Clause
@@ -1035,7 +1035,9 @@ 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 \
@@ -2892,6 +2894,9 @@ fi
 %endif
 
 %changelog
+* Thu Jun 12 2025 Siddhesh Poyarekar <siddhesh@redhat.com> 15.1.1-2.2
+- Tune for z16 on s390x by default on RHEL10 and later (RHEL-94282)
+
 * Fri Jun  6 2025 Marek Polacek <polacek@redhat.com> 15.1.1-2.1
 - configure with --enable-host-pie --enable-host-bind-now (RHEL-95595)