diff --git a/roles/koschei/backend/templates/config-backend.cfg.j2 b/roles/koschei/backend/templates/config-backend.cfg.j2
index e2668604ab..672c694eef 100644
--- a/roles/koschei/backend/templates/config-backend.cfg.j2
+++ b/roles/koschei/backend/templates/config-backend.cfg.j2
@@ -28,7 +28,7 @@ config = {
         "load_threshold": 1,
         {% else %}
         "max_builds": 60,
-        "build_arches": ['i386', 'x86_64', 'armhfp', 'aarch64', 'ppc64', 'ppc64le'],
+        "build_arches": ['i386', 'x86_64', 'armhfp', 'aarch64', 'ppc64', 'ppc64le', 's390x'],
         "load_threshold": 0.65,
         {% endif %}
         "task_priority": 30,