Index: orte/mca/iof/hnp/iof_hnp.c
===================================================================
--- orte/mca/iof/hnp/iof_hnp.c	(revision 23378)
+++ orte/mca/iof/hnp/iof_hnp.c	(working copy)
@@ -166,7 +166,9 @@
                 np = np / 10;
             }
             /* construct the filename */
-            asprintf(&outfile, "%s.%0*lu", orte_output_filename, numdigs, (unsigned long)proct->name.vpid);
+            asprintf(&outfile, "%s.%d.%0*lu", orte_output_filename,
+                     (int)ORTE_LOCAL_JOBID(proct->name.jobid),
+                     numdigs, (unsigned long)proct->name.vpid);
             /* create the file */
             fdout = open(outfile, O_CREAT|O_RDWR|O_TRUNC, 0644);
             free(outfile);
Index: orte/mca/iof/orted/iof_orted.c
===================================================================
--- orte/mca/iof/orted/iof_orted.c	(revision 23378)
+++ orte/mca/iof/orted/iof_orted.c	(working copy)
@@ -152,7 +152,9 @@
             np = np / 10;
         }
         /* construct the filename */
-        asprintf(&outfile, "%s.%0*lu", orte_output_filename, numdigs, (unsigned long)proct->name.vpid);
+        asprintf(&outfile, "%s.%d.%0*lu", orte_output_filename,
+                 (int)ORTE_LOCAL_JOBID(proct->name.jobid),
+                 numdigs, (unsigned long)proct->name.vpid);
         /* create the file */
         fdout = open(outfile, O_CREAT|O_RDWR|O_TRUNC, 0644);
         free(outfile);