1 files changed, 3 insertions, 0 deletions

diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index 81b2d8a32fb0..a7f3d45a8acf 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -68,4 +68,7 @@ int snd_usb_mixer_activate(struct usb_mixer_interface *mixer);
 int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
                               struct snd_kcontrol *kctl);
 
+int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
+                          unsigned int size, unsigned int __user *_tlv);
+
 #endif /* __USBMIXER_H */