diff --git a/drivers/acpi/bay.c b/drivers/acpi/bay.c
index 3f0ae7d341e7..aa1b131c0fce 100644
--- a/drivers/acpi/bay.c
+++ b/drivers/acpi/bay.c
@@ -69,7 +69,7 @@ struct bay {
 	struct platform_device *pdev;
 };
 
-LIST_HEAD(drive_bays);
+static LIST_HEAD(drive_bays);
 
 
 /*****************************************************************************