diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index c5cd5b5513e67a144ac3a7d2b5a76dc9f494bc48..0cc384b72943a0b5e3eacd811de149b788a887b2 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -146,7 +146,7 @@ struct acpi_battery {
 
 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat)
 
-inline int acpi_battery_present(struct acpi_battery *battery)
+static inline int acpi_battery_present(struct acpi_battery *battery)
 {
 	return battery->device->status.battery_present;
 }