diff --git a/manual.scrbl b/manual.scrbl
index 599685b..dc67fe9 100644
--- a/manual.scrbl
+++ b/manual.scrbl
@@ -216,6 +216,10 @@ Graph properties are not supported.
 		   [#:colors colors (HashTable Any Natural) #f])
 		   String]{}
 
+@subsection{Other}
+
+Auxiliary definitions are not supported.
+
 @section{License}
 
 Like the generic graph library, this library is licensed under the Apache