diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
index bc2a2feb0b..53b3f1f651 100644
--- a/doc/src/sgml/protocol.sgml
+++ b/doc/src/sgml/protocol.sgml
@@ -6498,6 +6498,18 @@ Message
+
+
+
+ Int32
+
+
+
+ Length of the content.
+
+
+
+
Byten
@@ -7430,6 +7442,19 @@ TupleData
+
+ Or
+
+
+
+ Byte1('b')
+
+
+
+ Identifies the data as binary value.
+
+
+
Int32