diff --git a/NonStandardLuaLibs.md b/NonStandardLuaLibs.md
index d955480..c3cc32f 100644
--- a/NonStandardLuaLibs.md
+++ b/NonStandardLuaLibs.md
@@ -66,7 +66,7 @@ The [original functions](http://www.lua.org/manual/5.2/manual.html#6.9) from the
 - `os.date` has been reimplemented to use ingame time and supports most formats.
 - `os.execute` has been reimplemented to start programs from a mounted filesystem via `shell.execute`. The specified string is parsed the same as commands entered in the shell.
 - `os.exit` throws an error to try and terminate the current coroutine.
-- `os.getenv` is *not* available.
+- `os.setenv` is added to set shell variables from Lua.
 - `os.remove` is an alias for `filesystem.remove`.
 - `os.rename` is an alias for `filesystem.rename`.
 - `os.setlocale` is *not* available.