diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h
index eb4c654..c7aa154 100644
--- a/include/linux/tracehook.h
+++ b/include/linux/tracehook.h
@@ -502,7 +502,7 @@
 static inline int tracehook_notify_death(struct task_struct *task,
 					 void **death_cookie, int group_dead)
 {
-	if (task->exit_signal == -1)
+	if (task_detached(task))
 		return task->ptrace ? SIGCHLD : DEATH_REAP;
 
 	/*