diff --git a/include/asm-x86/apic.h b/include/asm-x86/apic.h
index d0a221f..18d932d 100644
--- a/include/asm-x86/apic.h
+++ b/include/asm-x86/apic.h
@@ -42,6 +42,7 @@
 
 extern int apic_runs_main_timer;
 extern int ioapic_force;
+extern int disable_apic;
 extern int disable_apic_timer;
 extern unsigned boot_cpu_id;