diff --git a/gcc-toolset-16-gcc.spec b/gcc-toolset-16-gcc.spec
index fcef01e..cc65f24 100644
--- a/gcc-toolset-16-gcc.spec
+++ b/gcc-toolset-16-gcc.spec
@@ -260,12 +260,10 @@ 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: /usr/lib/libc.so /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