diff --git a/sound/ac97/bus.c b/sound/ac97/bus.c
index 1dc7965eb14b..5e46b972a3da 100644
--- a/sound/ac97/bus.c
+++ b/sound/ac97/bus.c
@@ -15,6 +15,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 #include <linux/sysfs.h>
+#include <sound/ac97_codec.h>
 #include <sound/ac97/codec.h>
 #include <sound/ac97/controller.h>
 #include <sound/ac97/regs.h>
@@ -529,7 +530,7 @@ static void ac97_bus_remove(struct device *dev)
 	pm_runtime_disable(dev);
 }
 
-static struct bus_type ac97_bus_type = {
+const struct bus_type ac97_bus_type = {
 	.name		= "ac97bus",
 	.dev_groups	= ac97_dev_groups,
 	.match		= ac97_bus_match,