diff --git a/doc/source/conf.py b/doc/source/conf.py
index 10065ee2..058a3c6f 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -234,6 +234,7 @@ rst_epilog += '.. |modulefilesdir| replace:: %s\n' % modulefilesdir
 rst_epilog += '.. |emph modulefilesdir| replace:: *%s*\n' % modulefilesdir
 rst_epilog += '.. |bold modulefilesdir| replace:: **%s**\n' % modulefilesdir
 rst_epilog += '.. |file modulefilesdir| replace:: :file:`%s`\n' % modulefilesdir
+rst_epilog += '.. |code version| replace:: ``%s``\n' % version
 
 
 # -- Options for manual page output ---------------------------------------
diff --git a/doc/source/modulefile.rst b/doc/source/modulefile.rst
index ae088bab..5e45b37b 100644
--- a/doc/source/modulefile.rst
+++ b/doc/source/modulefile.rst
@@ -733,6 +733,26 @@ Modules Variables
  The :mfvar:`ModulesCurrentModulefile` variable contains the full pathname of
  the *modulefile* being interpreted.
 
+.. mfvar:: ModuleTool
+
+ The :mfvar:`ModuleTool` variable contains the name of the *module*
+ implementation currently in use. The value of this variable is set to
+ ``Modules`` for this implementation.
+
+ .. only:: html
+
+    .. versionadded:: 4.7
+
+.. mfvar:: ModuleToolVersion
+
+ The :mfvar:`ModuleToolVersion` variable contains the version of the *module*
+ implementation currently in use. The value of this variable is set to
+ |code version| for this version of Modules.
+
+ .. only:: html
+
+    .. versionadded:: 4.7
+
 .. _Locating Modulefiles:
 
 Locating Modulefiles