diff --git a/include/asm-x86/ipi.h b/include/asm-x86/ipi.h
index ecc80f341f37723bd689c26da6efb86241c704f5..196d63c28aa44aa3365977da4b729d59444fcb69 100644
--- a/include/asm-x86/ipi.h
+++ b/include/asm-x86/ipi.h
@@ -20,6 +20,7 @@
 
 #include <asm/hw_irq.h>
 #include <asm/apic.h>
+#include <asm/smp.h>
 
 /*
  * the following functions deal with sending IPIs between CPUs.