diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 8e1ba0b..48723d6 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -137,6 +137,8 @@
 		break;
 	}
 }
+#else
+#define set_msi_affinity NULL
 #endif /* CONFIG_SMP */
 
 static void mask_MSI_irq(unsigned int vector)
@@ -214,7 +216,7 @@
 	.disable	= mask_MSI_irq,
 	.ack		= mask_MSI_irq,
 	.end		= end_msi_irq_w_maskbit,
-	.set_affinity	= set_msi_irq_affinity
+	.set_affinity	= set_msi_affinity
 };
 
 /*
@@ -230,7 +232,7 @@
 	.disable	= mask_MSI_irq,
 	.ack		= mask_MSI_irq,
 	.end		= end_msi_irq_w_maskbit,
-	.set_affinity	= set_msi_irq_affinity
+	.set_affinity	= set_msi_affinity
 };
 
 /*
@@ -246,7 +248,7 @@
 	.disable	= do_nothing,
 	.ack		= do_nothing,
 	.end		= end_msi_irq_wo_maskbit,
-	.set_affinity	= set_msi_irq_affinity
+	.set_affinity	= set_msi_affinity
 };
 
 static void msi_data_init(struct msg_data *msi_data,
diff --git a/drivers/pci/msi.h b/drivers/pci/msi.h
index 402136a..4ac52d4 100644
--- a/drivers/pci/msi.h
+++ b/drivers/pci/msi.h
@@ -22,12 +22,6 @@
 extern void (*interrupt[NR_IRQS])(void);
 extern int pci_vector_resources(int last, int nr_released);
 
-#ifdef CONFIG_SMP
-#define set_msi_irq_affinity	set_msi_affinity
-#else
-#define set_msi_irq_affinity	NULL
-#endif
-
 /*
  * MSI-X Address Register
  */