diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 71a3ca1..023c986 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -1383,6 +1383,7 @@
 	.name = "mqueue",
 	.mount = mqueue_mount,
 	.kill_sb = kill_litter_super,
+	.fs_flags = FS_USERNS_MOUNT,
 };
 
 int mq_init_ns(struct ipc_namespace *ns)