diff --git a/sys/dev/sound/pcm/channel.h b/sys/dev/sound/pcm/channel.h
--- a/sys/dev/sound/pcm/channel.h
+++ b/sys/dev/sound/pcm/channel.h
@@ -408,7 +408,7 @@
 
 #define CHN_F_RESET		(CHN_F_BUSY | CHN_F_DEAD |		\
 				 CHN_F_VIRTUAL | CHN_F_HAS_VCHAN |	\
-				 CHN_F_VCHAN_DYNAMIC |			\
+				 CHN_F_VCHAN_DYNAMIC | CHN_F_NBIO |	\
 				 CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE)
 
 #define CHN_F_MMAP_INVALID	(CHN_F_DEAD | CHN_F_RUNNING)
diff --git a/sys/dev/sound/pcm/dsp.c b/sys/dev/sound/pcm/dsp.c
--- a/sys/dev/sound/pcm/dsp.c
+++ b/sys/dev/sound/pcm/dsp.c
@@ -299,7 +299,7 @@
 			CHN_LOCK(rdch);
 			chn_abort(rdch); /* won't sleep */
 			rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
-			    CHN_F_DEAD | CHN_F_EXCLUSIVE);
+			    CHN_F_DEAD | CHN_F_EXCLUSIVE | CHN_F_NBIO);
 			chn_reset(rdch, 0, 0);
 			chn_release(rdch);
 			if (rdch->flags & CHN_F_VIRTUAL) {
@@ -323,7 +323,7 @@
 			CHN_LOCK(wrch);
 			chn_flush(wrch); /* may sleep */
 			wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
-			    CHN_F_DEAD | CHN_F_EXCLUSIVE);
+			    CHN_F_DEAD | CHN_F_EXCLUSIVE | CHN_F_NBIO);
 			chn_reset(wrch, 0, 0);
 			chn_release(wrch);
 			if (wrch->flags & CHN_F_VIRTUAL) {