diff --git a/drivers/power/apm_power.c b/drivers/power/apm_power.c
index a489227..936bae5 100644
--- a/drivers/power/apm_power.c
+++ b/drivers/power/apm_power.c
@@ -78,7 +78,7 @@
 	main_battery = NULL;
 	bp.main = main_battery;
 
-	error = class_for_each_device(power_supply_class, &bp,
+	error = class_for_each_device(power_supply_class, NULL, &bp,
 				      __find_main_battery);
 	if (error) {
 		main_battery = bp.main;