diff --git a/api/py/ai/chronon/repo/run.py b/api/py/ai/chronon/repo/run.py
index 88036b095..7ee1a34ce 100755
--- a/api/py/ai/chronon/repo/run.py
+++ b/api/py/ai/chronon/repo/run.py
@@ -506,7 +506,7 @@ def _gen_final_args(self, start_ds=None, end_ds=None):
             online_jar=self.online_jar,
             online_class=self.online_class,
         )
-        override_start_partition_arg = "--start-partition-override=" + start_ds if start_ds else ""
+        override_start_partition_arg = " --start-partition-override=" + start_ds if start_ds else ""
         final_args = base_args + " " + str(self.args) + override_start_partition_arg
         return final_args