diff --git a/lib/galaxy/jobs/handler.py b/lib/galaxy/jobs/handler.py
index f3965abb59bf..0213a797aab4 100644
--- a/lib/galaxy/jobs/handler.py
+++ b/lib/galaxy/jobs/handler.py
@@ -999,7 +999,7 @@ def __cache_total_job_count_per_destination(self):
                 .where(and_(model.Job.table.c.state.in_((model.Job.states.QUEUED, model.Job.states.RUNNING))))
                 .group_by(model.Job.table.c.destination_id)
             )
-            for row in result:
+            for row in result.mappings():
                 self.total_job_count_per_destination[row["destination_id"]] = row["job_count"]
 
     def get_total_job_count_per_destination(self):