diff --git a/doc/containers.texi b/doc/containers.texi
index 15c915b..6a9b22e 100644
--- a/doc/containers.texi
+++ b/doc/containers.texi
@@ -35,6 +35,9 @@ log
 Gnulib provides several generic container data types.  They can be used
 to organize collections of application-defined objects.
 
+@node Ordinary containers
+@subsection Ordinary container data types
+
 @multitable @columnfractions .15 .5 .1 .1 .15
 @headitem Data type
 @tab Details
@@ -599,6 +602,11 @@ For C++, Gnulib provides a C++ template class for each of these container data t
 @tab @code{"gl_omap.hh"}
 @end multitable
 
+@node Specialized containers
+@subsection Specialized container data types
+
+HAMT ...
+
 @ifnottex
 @unmacro log
 @end ifnottex