diff --git a/argo-pipeline/src/make_metadata_datasets.py b/argo-pipeline/src/make_metadata_datasets.py
index d42a8f8..ef05546 100644
--- a/argo-pipeline/src/make_metadata_datasets.py
+++ b/argo-pipeline/src/make_metadata_datasets.py
@@ -86,7 +86,7 @@ def main(
                 path_within_bucket=path_within_bucket,
                 year=year,
             )
-            if metadata is None:
+            if metadata.empty:
                 continue
 
             for key in [