diff --git a/gcc-toolset-15-gcc.spec b/gcc-toolset-15-gcc.spec
index 92767e3..6bd9eff 100644
--- a/gcc-toolset-15-gcc.spec
+++ b/gcc-toolset-15-gcc.spec
@@ -172,7 +172,7 @@ BuildRequires: gcc-toolset-%{gts_ver}-devel
 Summary: GCC version %{gcc_major}
 Name: %{?scl_prefix}gcc
 Version: %{gcc_version}
-Release: %{gcc_release}.5%{?dist}.alma.1
+Release: %{gcc_release}.6%{?dist}.alma.1
 # License notes for some of the less obvious ones:
 #   gcc/doc/cppinternals.texi: Linux-man-pages-copyleft-2-para
 #   isl: MIT, BSD-2-Clause
@@ -252,12 +252,10 @@ BuildRequires: libzstd-devel
 BuildRequires: glibc >= 2.3.90-35
 %endif
 %ifarch %{multilib_64_archs}
-# Ensure glibc{,-devel} is installed for both multilib arches
-%if 0%{?rhel} < 10
-BuildRequires: /lib/libc.so.6 /usr/lib/libc.so /lib64/libc.so.6 /usr/lib64/libc.so
-%else
-BuildRequires: glibc32 /usr/lib64/libc.so
+BuildRequires: (glibc32 or glibc-devel(%{__isa_name}-32))
 %endif
+%ifarch sparcv9 ppc
+BuildRequires: (glibc64 or glibc-devel(%{__isa_name}-64))
 %endif
 %ifarch ia64
 BuildRequires: libunwind >= 0.98
@@ -2908,10 +2906,12 @@ fi
 %endif
 
 %changelog
-* Thu Aug 14 2025 Eduard Abdullin <eabdullin@almalinux.org> - 15.1.1-2.5.alma.1
+* Fri Sep 26 2025 Eduard Abdullin <eabdullin@almalinux.org> - 15.1.1-2.6.alma.1
 - Change to almalinux bugtracker
 - Set --with-arch_64=x86-64-v2 on v2 arch
-- Use glibc32 instead of /usr/lib/libc.so as BuildRequires
+
+* Tue Sep  9 2025 Siddhesh Poyarekar <siddhesh@redhat.com> 15.1.1-2.6
+- Fix glibc32 build dependency (RHEL-113183)
 
 * Wed Jul 30 2025 Siddhesh Poyarekar <siddhesh@redhat.com> 15.1.1-2.5
 - Drop the workaround for CVE-2025-5702 (RHEL-100161)