diff --git a/flannel.changes b/flannel.changes
index 53533d7..055637a 100644
--- a/flannel.changes
+++ b/flannel.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Feb  1 16:58:22 CET 2018 - ro@suse.de
+
+- do not build on s390, only on s390x (no go on s390)
+
 -------------------------------------------------------------------
 Mon Nov 27 09:28:36 UTC 2017 - opensuse-packaging@opensuse.org
 
diff --git a/flannel.spec b/flannel.spec
index c667ff6..63c2970 100644
--- a/flannel.spec
+++ b/flannel.spec
@@ -39,6 +39,7 @@ BuildRequires:  xz
 BuildRequires:  golang(API) >= 1.8
 Requires(post): %fillup_prereq
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
+ExcludeArch:    s390
 %{go_nostrip}
 %{go_provides}
 %{?systemd_requires}