diff --git a/share/man/man4/pcm.4 b/share/man/man4/pcm.4
--- a/share/man/man4/pcm.4
+++ b/share/man/man4/pcm.4
@@ -614,7 +614,7 @@
 .Nm
 devices available:
 .Pp
-.Dl sysctl hw.snd.default_unit=1
+.Dl mixer -d pcm1
 .Sh DIAGNOSTICS
 .Bl -diag
 .It pcm%d:play:%d:dsp%d.p%d: play interrupt timeout, channel dead