diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 78648f8110494cf0262a2d17f0bc77d2de258e67..68d720af71edb03cfaa46e840fa77043f16be72c 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -825,7 +825,7 @@ static ssize_t show_docked(struct device *dev,
 
 	struct dock_station *dock_station = dev->platform_data;
 
-	if (ACPI_SUCCESS(acpi_bus_get_device(dock_station->handle, &tmp)))
+	if (!acpi_bus_get_device(dock_station->handle, &tmp))
 		return snprintf(buf, PAGE_SIZE, "1\n");
 	return snprintf(buf, PAGE_SIZE, "0\n");
 }