diff --git a/lib/generic/README.rst b/lib/generic/README.rst
index 7e4d765b1ad4229284ef01a90409065211bab72b..04b3194e434afbce92ffbd5f1a917dd98a8e60ea 100644
--- a/lib/generic/README.rst
+++ b/lib/generic/README.rst
@@ -12,6 +12,7 @@ Data structures
 * ``array`` - a set of simple macros to make working with dynamic arrays easier.
 * ``set`` - a `Crit-bit tree`_ simple implementation (public domain) that comes with tests.
 * ``map`` - key-value map implemented on top of ``set``.
+* ``pack`` - length-prefixed list of objects (i.e. array-list).
 
 API reference and examples
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -19,4 +20,4 @@ API reference and examples
 .. doxygengroup:: generics
    :project: libkresolve
 
-.. _`Crit-bit tree`: http://cr.yp.to/critbit.html 
\ No newline at end of file
+.. _`Crit-bit tree`: http://cr.yp.to/critbit.html