diff --git a/.gitignore b/.gitignore
index 610abe989..d9375c943 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ hugo
 docs/public*
 hugo.exe
 *.swp
+.DS_Store
diff --git a/docs/content/doc/usage.md b/docs/content/doc/usage.md
index 4de760892..b0d862e0c 100644
--- a/docs/content/doc/usage.md
+++ b/docs/content/doc/usage.md
@@ -37,7 +37,7 @@ immediately, tell Hugo to watch for changes. **It will
 recreate the site faster than you can tab over to
 your browser to view the changes.**
 
-    $ hugo --source ~/mysite --watch
+    $ hugo -s ~/mysite --watch
        Watching for changes. Press ctrl+c to stop
        15 pages created
        0 tags created