diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index a146ee327f6ac15029b64424f0abd07e8d316f67..4041f5747e73bf70f8d8dbb412f8e7b7067a8017 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -469,6 +469,7 @@ static int ptrace_detach(struct task_struct *child, unsigned int data)
 	/* Architecture-specific hardware disable .. */
 	ptrace_disable(child);
 	clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+	flush_ptrace_hw_breakpoint(child);
 
 	write_lock_irq(&tasklist_lock);
 	/*