diff --git a/.travis.yml b/.travis.yml
index 5d47e3c38..fe8d4a5d0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -36,6 +36,7 @@ matrix:
 
     - <<: *test-ubuntu
       os: linux-s390x
+      arch: s390x
       before_script:
         - COMMON_FLAGS="DYNAMIC_ARCH=1 TARGET=Z13 NUM_THREADS=32"
       env: