diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 30a7f33..7542b28 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -98,7 +98,7 @@
 	int i;
 	int err;
 
-	err = -EINVAL;
+	err = -ENOSPC;
 	if (level > MAX_PID_NS_LEVEL)
 		goto out;
 	ucounts = inc_pid_namespaces(user_ns);