diff --git a/sys/dev/sound/pcm/dsp.c b/sys/dev/sound/pcm/dsp.c
index 7baa442c3faa..dd69dcfc11e4 100644
--- a/sys/dev/sound/pcm/dsp.c
+++ b/sys/dev/sound/pcm/dsp.c
@@ -293,7 +293,6 @@ dsp_open(dev_t i_dev, int flags, int mode, struct thread *td)
 				CHN_LOCK(rdch);
 				pcm_chnref(rdch, -1);
 				pcm_chnrelease(rdch);
-				CHN_UNLOCK(rdch);
 			}
 			pcm_unlock(d);
 			splx(s);