diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 401e723e6c6662ff6d902f4a02b0f1ce9b5804f3..861ac378ce42c34eeddb2125e52682c9960bf0f0 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1433,7 +1433,7 @@ static int acpi_device_resume(struct device * dev)
 }
 
 
-struct bus_type acpi_bus_type = {
+static struct bus_type acpi_bus_type = {
 	.name		= "acpi",
 	.suspend	= acpi_device_suspend,
 	.resume		= acpi_device_resume,