diff --git a/doc/manuals/abipkgdiff.rst b/doc/manuals/abipkgdiff.rst
index 7e8abc6a..1772dca3 100644
--- a/doc/manuals/abipkgdiff.rst
+++ b/doc/manuals/abipkgdiff.rst
@@ -5,8 +5,10 @@ abipkgdiff
 ===========
 
 ``abipkgdiff`` compares the Application Binary Interfaces (ABI) of the
-`ELF`_ binaries contained in two software packages.  The software package formats of
-that are currently supported are `Deb`_ and `RPM`_.
+`ELF`_ binaries contained in two software packages.  The software
+package formats currently supported are `Deb`_, `RPM`_, `tar`_
+archives (either compressed or not) and plain directories that contain
+binaries.
 
 For a comprehensive ABI change report that includes changes about
 function and variable sub-types, the two input packages must be
@@ -16,6 +18,7 @@ information in `DWARF`_ format.
 .. _ELF: http://en.wikipedia.org/wiki/Executable_and_Linkable_Format
 .. _RPM: https://en.wikipedia.org/wiki/RPM_Package_Manager
 .. _Deb: https://en.wikipedia.org/wiki/Deb_%28file_format%29
+.. _tar: https://en.wikipedia.org/wiki/Tar_%28computing%29
 .. _DWARF: http://www.dwarfstd.org