diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index 5cfd3d91001aed8043764c88778d2df3e91681cf..e13125058bedb03eb56d2ab291d7c3e3628c9c25 100644
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -507,7 +507,7 @@ static int iosapic_find_sharable_irq(unsigned long trigger, unsigned long pol)
 	if (trigger == IOSAPIC_EDGE)
 		return -EINVAL;
 
-	for (i = 0; i <= NR_IRQS; i++) {
+	for (i = 0; i < NR_IRQS; i++) {
 		info = &iosapic_intr_info[i];
 		if (info->trigger == trigger && info->polarity == pol &&
 		    (info->dmode == IOSAPIC_FIXED ||