diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 66e99eb..b0ace60 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -444,8 +444,7 @@
 		return ERR_PTR(-EPERM);
 
 	read_lock(&tasklist_lock);
-	child = find_task_by_pid_ns(pid,
-			current->nsproxy->pid_ns);
+	child = find_task_by_vpid(pid);
 	if (child)
 		get_task_struct(child);