diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 15fcaacc1f8440c120eb1f8b9dfa79b26e907024..3f0a3edf0a573a2f5f2d1051b32285ebffcdbb36 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -33,7 +33,9 @@
  * HPET address is set in acpi/boot.c, when an ACPI entry exists
  */
 unsigned long				hpet_address;
+#ifdef CONFIG_PCI_MSI
 static unsigned long			hpet_num_timers;
+#endif
 static void __iomem			*hpet_virt_address;
 
 struct hpet_dev {