diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 3a10ef5914eb..6cd5b6403a7b 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -210,7 +210,7 @@ struct acpi_device_power_state {
 struct acpi_device_power {
 	int state;		/* Current state */
 	struct acpi_device_power_flags flags;
-	struct acpi_device_power_state states[4];	/* Power states (D0-D3) */
+	struct acpi_device_power_state states[ACPI_D_STATE_COUNT];	/* Power states (D0-D3Cold) */
 };
 
 /* Performance Management */