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-rw-r--r--sound/usb/mixer.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index e02653465e29..3d12af8bf191 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -109,4 +109,6 @@ int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
+extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
+
#endif /* __USBMIXER_H */