diff --git a/include/lynx.h b/include/lynx.h
index 199d0618e..23b161d98 100644
--- a/include/lynx.h
+++ b/include/lynx.h
@@ -105,6 +105,25 @@ extern void lynx_160_102_16[];    /* Referred to by tgi_static_stddrv[] */
 
 
 
+/*****************************************************************************/
+/*                           Sound support                                   */
+/*****************************************************************************/
+
+void lynx_snd_init ();
+/* Initialize the sound driver */
+
+void lynx_snd_pause ();
+/* Pause sound */
+
+void lynx_snd_unpause ();
+/* Continue sound after pause */
+
+void __fastcall__ lynx_snd_play (unsigned char channel, unsigned char *music);
+/* Play tune on channel */
+
+void lynx_snd_stop ();
+/* Stop sound on all channels */
+
 /*****************************************************************************/
 /*                           Accessing the cart                              */
 /*****************************************************************************/