diff --git a/setup/mac.md b/setup/mac.md
index 28f4f24..5edb72e 100644
--- a/setup/mac.md
+++ b/setup/mac.md
@@ -52,7 +52,7 @@ $ ./sbt.sh
 . (you'll see some [info] logs here)
 .
 .
-scala> Example.image.draw
+scala> Example.image.draw()
 ```
 
 An image of three circles should appear!