diff --git a/.gitignore b/.gitignore
index cf8db5d..2ce8630 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,9 +1,12 @@
+# for Racket
+**/compiled/
+
+# for Mac OS X
 .DS_Store
 .AppleDouble
 .LSOverride
 Icon
 
-
 # Thumbnails
 ._*