diff --git a/drivers/base/core.c b/drivers/base/core.c
index 658eae5..9ea12d9 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -43,7 +43,8 @@
 const char *dev_driver_string(struct device *dev)
 {
 	return dev->driver ? dev->driver->name :
-			(dev->bus ? dev->bus->name : "");
+			(dev->bus ? dev->bus->name :
+			(dev->class ? dev->class->name : ""));
 }
 EXPORT_SYMBOL(dev_driver_string);