diff --git a/sys/dev/sound/pcm/dsp.c b/sys/dev/sound/pcm/dsp.c
index 3990866648f3..c7d4850776f1 100644
--- a/sys/dev/sound/pcm/dsp.c
+++ b/sys/dev/sound/pcm/dsp.c
@@ -509,6 +509,16 @@ dsp_ioctl(snddev_info *d, int chan, u_long cmd, caddr_t arg)
 			*arg_i |= PCM_ENABLE_INPUT;
 		break;
 
+		case SNDCTL_DSP_GETODELAY:
+			if (wrch) {
+				snd_dbuf *b = &wrch->buffer;
+				if (b->dl)
+					chn_dmaupdate(wrch);
+				*arg = b->total;
+			} else
+				ret = EINVAL;
+			break;
+
     	case SNDCTL_DSP_MAPINBUF:
     	case SNDCTL_DSP_MAPOUTBUF:
     	case SNDCTL_DSP_SETSYNCRO:
diff --git a/sys/sys/soundcard.h b/sys/sys/soundcard.h
index 1649f8a754e1..f6f577a1cd1f 100644
--- a/sys/sys/soundcard.h
+++ b/sys/sys/soundcard.h
@@ -798,6 +798,7 @@ typedef struct buffmem_desc {
 #define SNDCTL_DSP_MAPINBUF	_IOR ('P', 19, buffmem_desc)
 #define SNDCTL_DSP_MAPOUTBUF	_IOR ('P', 20, buffmem_desc)
 #define SNDCTL_DSP_SETSYNCRO	_IO  ('P', 21)
+#define SNDCTL_DSP_GETODELAY	_IOR ('P', 23, int)
 
 /*
  * I guess these are the readonly version of the same