diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index fee6a1ee3a0f..27936fe89434 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -1038,7 +1038,7 @@ int arizona_dev_exit(struct arizona *arizona)
 	if (arizona->pdata.reset)
 		gpio_set_value_cansleep(arizona->pdata.reset, 0);
 
-	regulator_bulk_disable(ARRAY_SIZE(arizona->core_supplies),
+	regulator_bulk_disable(arizona->num_core_supplies,
 			       arizona->core_supplies);
 	return 0;
 }