diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 5faacbb..b487e22 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -492,6 +492,10 @@
 	depends on GENERIC_HARDIRQS && SMP
 	default y
 
+config IRQ_PER_CPU
+	bool
+	default y
+
 source "arch/ia64/hp/sim/Kconfig"
 
 menu "Instrumentation Support"