diff --git a/s3/charmcraft.yaml b/s3/charmcraft.yaml
index f462b43..6861471 100644
--- a/s3/charmcraft.yaml
+++ b/s3/charmcraft.yaml
@@ -5,6 +5,7 @@ type: charm
 platforms:
   ubuntu@24.04:amd64:
   ubuntu@24.04:arm64:
+  ubuntu@24.04:s390x:
 # Files implicitly created by charmcraft without a part:
 # - dispatch (https://github.com/canonical/charmcraft/pull/1898)
 # - manifest.yaml