diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index e52ad91..4869fa1 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -912,7 +912,7 @@
 
 __setup("acpi_irq_nobalance", acpi_irq_nobalance_set);
 
-int __init acpi_irq_balance_set(char *str)
+static int __init acpi_irq_balance_set(char *str)
 {
 	acpi_irq_balance = 1;
 	return 1;