diff --git a/docs/fs.txt b/docs/fs.txt
index c3d173e..8372afd 100644
--- a/docs/fs.txt
+++ b/docs/fs.txt
@@ -11,6 +11,9 @@ filepath.Dir
 glob(pattern) > Glob all files and directories that match the pattern.
 For the rules, see Go's filepath.Glob
 
+join(paths...) > Takes paths and joins them together with the OS's
+directory separator (forward or backward slash).
+
 mkdir(name, recursive) > Makes a directory called `name`. If `recursive` is true, it will create its parent directories.
 
 readdir(dir) > Returns a table of files in `dir`
diff --git a/emmyLuaDocs/fs.lua b/emmyLuaDocs/fs.lua
index 5fbfb2b..14e7be4 100644
--- a/emmyLuaDocs/fs.lua
+++ b/emmyLuaDocs/fs.lua
@@ -22,6 +22,10 @@ function fs.dir() end
 --- For the rules, see Go's filepath.Glob
 function fs.glob() end
 
+--- Takes paths and joins them together with the OS's
+--- directory separator (forward or backward slash).
+function fs.join() end
+
 --- Makes a directory called `name`. If `recursive` is true, it will create its parent directories.
 --- @param name string
 --- @param recursive boolean