diff --git a/redhat-rpm-config.spec b/redhat-rpm-config.spec
index bf6fc18..0449ff5 100644
--- a/redhat-rpm-config.spec
+++ b/redhat-rpm-config.spec
@@ -6,7 +6,7 @@
 
 Summary: Red Hat specific rpm configuration files
 Name: redhat-rpm-config
-Version: 62
+Version: 63
 Release: 1%{?dist}
 # No version specified.
 License: GPL+
@@ -142,6 +142,9 @@ install -p -m 755 -t %{buildroot}%{_rpmconfigdir} kmod.prov
 %{_rpmconfigdir}/macros.d/macros.kmp
 
 %changelog
+* Thu Feb 02 2017 Dan Horák <dan[at]danny.cz> - 63-1
+- set zEC12 as minimum architecture level for s390(x) (#1404991)
+
 * Thu Dec 15 2016 Jason L Tibbitts III <tibbs@math.uh.edu> - 62-1
 - Add macros.vpath (https://fedorahosted.org/fpc/attachment/ticket/655)
 
diff --git a/rpmrc b/rpmrc
index 9ea6aaa..c7336d6 100644
--- a/rpmrc
+++ b/rpmrc
@@ -71,8 +71,8 @@ optflags: atariclone %{__global_compiler_flags}
 optflags: milan %{__global_compiler_flags}
 optflags: hades %{__global_compiler_flags}
 
-optflags: s390 %{__global_compiler_flags} -m31 -march=z10 -mtune=z10
-optflags: s390x %{__global_compiler_flags} -m64 -march=z10 -mtune=z10
+optflags: s390 %{__global_compiler_flags} -m31 -march=zEC12 -mtune=z13
+optflags: s390x %{__global_compiler_flags} -m64 -march=zEC12 -mtune=z13
 
 optflags: aarch64 %{__global_compiler_flags}