diff --git a/libsndio/mio_open.3 b/libsndio/mio_open.3
index 9cf0f5f..cbfdff4 100644
--- a/libsndio/mio_open.3
+++ b/libsndio/mio_open.3
@@ -26,7 +26,7 @@
 .Nm mio_pollfd ,
 .Nm mio_revents ,
 .Nm mio_eof
-.Nd interface to MIDI streams
+.Nd sndio interface to MIDI streams
 .Sh SYNOPSIS
 .In sndio.h
 .Ft "struct mio_hdl *"
diff --git a/libsndio/sio_open.3 b/libsndio/sio_open.3
index ec9f324..7fc9378 100644
--- a/libsndio/sio_open.3
+++ b/libsndio/sio_open.3
@@ -35,7 +35,7 @@
 .Nm sio_setvol ,
 .Nm sio_onvol ,
 .Nm sio_initpar
-.Nd interface to audio devices
+.Nd sndio interface to audio devices
 .Sh SYNOPSIS
 .In sndio.h
 .Ft "struct sio_hdl *"