diff --git a/Documentation/sophia-net-signalling.md b/Documentation/sophia-net-signalling.md
index 648e0cb..3b3f2a0 100644
--- a/Documentation/sophia-net-signalling.md
+++ b/Documentation/sophia-net-signalling.md
@@ -11,7 +11,8 @@ the following Signalling applies:
 |0x81		|AC-3 Audio							|
 |0x82		|PID only used for PCR				|
 |0x83		|AC-3 True HD Audio                 |
-|0x84       |ULE (RFC 4326)                     |
+|0x84       |AC-3+ Audio                        |
+|0x85       |ULE (RFC 4326)                     |
 
 ## Descriptors: