diff --git a/docs/seminar.tex b/docs/seminar.tex
index 7ec82c8..bc02e7c 100644
--- a/docs/seminar.tex
+++ b/docs/seminar.tex
@@ -72,7 +72,8 @@
   \listinginfo{}{msg}{Content intended to be received by one user.}{}
   \listinginfo{}{broadcast}{Content sent in a way that the Addresses public key can be used to decrypt it, allowing any subscriber who knows the address to receive the such a message}{}
 
-  \subsubsection{ping / pong}
+  \subsubsection{ping / pong / getbiginv}
+  TODO: See https://github.com/Bitmessage/PyBitmessage/issues/112
 
   \subsection{Addresses}
   \label{subsec:addr}