diff --git a/kernel/sys.c b/kernel/sys.c
index 37f458e..742cefa 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1013,10 +1013,8 @@
 	if (err)
 		goto out;
 
-	if (task_pgrp(p) != pgrp) {
+	if (task_pgrp(p) != pgrp)
 		change_pid(p, PIDTYPE_PGID, pgrp);
-		set_task_pgrp(p, pid_nr(pgrp));
-	}
 
 	err = 0;
 out: