diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c
index 50d438d..68d3947 100644
--- a/arch/alpha/kernel/smp.c
+++ b/arch/alpha/kernel/smp.c
@@ -487,7 +487,7 @@
 }
 
 int __cpuinit
-__cpu_up(unsigned int cpu)
+__cpu_up(unsigned int cpu, struct task_struct *tidle)
 {
 	smp_boot_one_cpu(cpu);