diff --git a/include/asm-mips/smtc_ipi.h b/include/asm-mips/smtc_ipi.h
index a52a4a7..e09131a 100644
--- a/include/asm-mips/smtc_ipi.h
+++ b/include/asm-mips/smtc_ipi.h
@@ -34,6 +34,7 @@
 
 #define LINUX_SMP_IPI 1
 #define SMTC_CLOCK_TICK 2
+#define IRQ_AFFINITY_IPI 3
 
 /*
  * A queue of IPI messages