diff --git a/src/qtoolkit/io/pbs_base.py b/src/qtoolkit/io/pbs_base.py
index 21d2bc9..bf47605 100644
--- a/src/qtoolkit/io/pbs_base.py
+++ b/src/qtoolkit/io/pbs_base.py
@@ -99,7 +99,7 @@ def _get_jobs_list_cmd(
             command.append(f"-u {user}")
 
         if job_ids:
-            job_ids_str = ",".join(job_ids)
+            job_ids_str = " ".join(job_ids)
             command.append(self._get_job_ids_flag(job_ids_str))
 
         return " ".join(command)