diff --git a/kernel/fork.c b/kernel/fork.c
index 9f8ef32..0c969f4 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1246,7 +1246,7 @@
 	 * parent's CPU). This avoids alot of nasty races.
 	 */
 	p->cpus_allowed = current->cpus_allowed;
-	p->nr_cpus_allowed = current->nr_cpus_allowed;
+	p->rt.nr_cpus_allowed = current->rt.nr_cpus_allowed;
 	if (unlikely(!cpu_isset(task_cpu(p), p->cpus_allowed) ||
 			!cpu_online(task_cpu(p))))
 		set_task_cpu(p, smp_processor_id());