diff --git a/bob/devtools/scripts/ci.py b/bob/devtools/scripts/ci.py
index 686c3700c16eeb1a5b2467d3350327da21532de8..664272832af6dbf95cb8c7f3241023649cc0fcf6 100644
--- a/bob/devtools/scripts/ci.py
+++ b/bob/devtools/scripts/ci.py
@@ -71,7 +71,7 @@ def deploy(dry_run):
     from ..ci import is_stable
     stable = is_stable(package,
         os.environ['CI_COMMIT_REF_NAME'],
-        os.environ['CI_COMMIT_TAG'],
+        os.environ.get('CI_COMMIT_TAG'),
         os.environ['CI_PROJECT_DIR'])
 
     from ..constants import WEBDAV_PATHS