diff --git a/drivers/acpi/device_sysfs.c b/drivers/acpi/device_sysfs.c
index 566067a855a136b28291792087fd2e957021ed52..57ee8314dfb8a0c8767a3f6d6b05f34872183c57 100644
--- a/drivers/acpi/device_sysfs.c
+++ b/drivers/acpi/device_sysfs.c
@@ -533,8 +533,9 @@ int acpi_device_setup_files(struct acpi_device *dev)
 	 * If device has _STR, 'description' file is created
 	 */
 	if (acpi_has_method(dev->handle, "_STR")) {
-		status = acpi_evaluate_object(dev->handle, "_STR",
-					NULL, &buffer);
+		status = acpi_evaluate_object_typed(dev->handle, "_STR",
+						    NULL, &buffer,
+						    ACPI_TYPE_BUFFER);
 		if (ACPI_FAILURE(status))
 			buffer.pointer = NULL;
 		dev->pnp.str_obj = buffer.pointer;