diff --git a/openeo_driver/jobregistry.py b/openeo_driver/jobregistry.py
index 5e5632f4..b3054407 100644
--- a/openeo_driver/jobregistry.py
+++ b/openeo_driver/jobregistry.py
@@ -199,7 +199,7 @@ def map_safe(prop: str, f):
         return f(value) if value else None
 
     def get_results_metadata(result_metadata_prop: str):
-        return job_info.get("results_metadata", {}).get(result_metadata_prop)
+        return (job_info.get("results_metadata") or {}).get(result_metadata_prop)
 
     def map_results_metadata_safe(result_metadata_prop: str, f):
         value = get_results_metadata(result_metadata_prop)