diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 1d7cc7e..f8ae709 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -1689,7 +1689,7 @@
 	ti->preempt_count = 1;
 	ti->task = p;
 	ti->cpu = cpu;
-	p->thread_info = ti;
+	p->stack = ti;
 	p->state = TASK_UNINTERRUPTIBLE;
 	cpu_set(cpu, p->cpus_allowed);
 	INIT_LIST_HEAD(&p->tasks);