diff --git a/Source/cmakemain.cxx b/Source/cmakemain.cxx
index 198d123b1..0aaf58194 100644
--- a/Source/cmakemain.cxx
+++ b/Source/cmakemain.cxx
@@ -68,7 +68,11 @@ static const char * cmDocumentationOptions[][3] =
   {"-E", "CMake command mode.",
    "For true platform independence, CMake provides a list of commands "
    "that can be used on all systems. Run with -E help for the usage "
-   "information."},
+   "information. Commands availble are: chdir, copy, copy_if_different "
+   "copy_directory, compare_files, echo, echo_append, environment, "
+   "make_directory, md5sum, remove_directory, remove, tar, time, "
+   "touch, touch_nocreate, write_regv, delete_regv, comspec, "
+   "create_symlink."},
   {"-i", "Run in wizard mode.",
    "Wizard mode runs cmake interactively without a GUI.  The user is "
    "prompted to answer questions about the project configuration.  "