diff --git a/README.rst b/README.rst
index f77732c9..80723a8a 100644
--- a/README.rst
+++ b/README.rst
@@ -33,6 +33,8 @@ Key features of the various applications in this repository are as follows
 
 - ADAT input
 
+- Synchrnonisation to external digital streams i.e. S/PDIF or ADAT
+
 - I2S slave & master modes
 
 - TDM slave & master modes