diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index eddb624..23fdb84 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -505,7 +505,8 @@
 			sig_i.si_errno = 0;
 			sig_i.si_code = SI_MESGQ;
 			sig_i.si_value = info->notify.sigev_value;
-			sig_i.si_pid = task_tgid_vnr(current);
+			sig_i.si_pid = task_tgid_nr_ns(current,
+						ns_of_pid(info->notify_owner));
 			sig_i.si_uid = current_uid();
 
 			kill_pid_info(info->notify.sigev_signo,