diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 5aa9158..e1bafe3 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -108,6 +108,7 @@
 	err = ns_alloc_inum(&ns->ns);
 	if (err)
 		goto out_free_map;
+	ns->ns.ops = &pidns_operations;
 
 	kref_init(&ns->kref);
 	ns->level = level;