diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 3f244eb9..5cfb7b5 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -77,7 +77,7 @@
 #define	OSI_STRING_LENGTH_MAX 64	/* arbitrary */
 static char osi_additional_string[OSI_STRING_LENGTH_MAX];
 
-int osi_linux;		/* disable _OSI(Linux) by default */
+static int osi_linux;		/* disable _OSI(Linux) by default */
 
 #ifdef CONFIG_DMI
 static struct __initdata dmi_system_id acpi_osl_dmi_table[];