diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 99dc29f2f2f2..0c52a4079124 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -1,5 +1,5 @@
 menuconfig POWER_SUPPLY
-	tristate "Power supply class support"
+	bool "Power supply class support"
 	help
 	  Say Y here to enable power supply class support. This allows
 	  power supply (batteries, AC, USB) monitoring by userspace
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index fd17ae0f9c20..3b912bee28d1 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -212,7 +212,7 @@ extern void power_supply_changed(struct power_supply *psy);
 extern int power_supply_am_i_supplied(struct power_supply *psy);
 extern int power_supply_set_battery_charged(struct power_supply *psy);
 
-#if defined(CONFIG_POWER_SUPPLY) || defined(CONFIG_POWER_SUPPLY_MODULE)
+#ifdef CONFIG_POWER_SUPPLY
 extern int power_supply_is_system_supplied(void);
 #else
 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }