diff --git a/man/shairport-sync.7 b/man/shairport-sync.7
index e2eed3ab..0da7ba01 100644
--- a/man/shairport-sync.7
+++ b/man/shairport-sync.7
@@ -187,6 +187,11 @@ Use this optional advanced setting to set the alsa buffer size near to this valu
\fBuse_mmap_if_available=\f1\fI"yes"\f1\fB;\f1
Use this optional advanced setting to control whether MMAP-based output is used to communicate with the DAC. Default is \fI"yes"\f1.
.TP
+\fBmute_using_playback_switch=\f1\fI"yes"\f1\fB;\f1
+This is an advanced setting and the default is \fI"yes"\f1, which means that hardware mute will be implemented using a feature called a 'playback switch', where one is available; set it to \fI"no"\f1 to prevent the playback switch being used.
+
+The motivation for this is to avoid using the alsa function call "snd_mixer_selem_set_playback_switch_all", which is incorrectly implemented on certain soundcards, including the emulated card in VMWare Fusion 8.5.
+.TP
\fB"SNDIO" SETTINGS\f1
These settings are for the SNDIO back end, used to communicate with audio output devices in the SNDIO system.
.TP
diff --git a/man/shairport-sync.7.xml b/man/shairport-sync.7.xml
index 243babc3..c59d8988 100644
--- a/man/shairport-sync.7.xml
+++ b/man/shairport-sync.7.xml
@@ -332,9 +332,16 @@
use_mmap_if_available="yes";
Use this optional advanced setting to control whether MMAP-based output is used to communicate with the DAC. Default is "yes".
-
-
-
+
+
These settings are for the SNDIO back end, used to communicate with audio output devices in the SNDIO system.