diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 0bf44be9f8bc..022e28a781f2 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -80,12 +80,11 @@ void __ptrace_unlink(struct task_struct *child)
 {
 	BUG_ON(!child->ptrace);
 
-	child->ptrace = 0;
 	child->parent = child->real_parent;
 	list_del_init(&child->ptrace_entry);
 
 	spin_lock(&child->sighand->siglock);
-
+	child->ptrace = 0;
 	/*
 	 * Clear all pending traps and TRAPPING.  TRAPPING should be
 	 * cleared regardless of JOBCTL_STOP_PENDING.  Do it explicitly.