diff --git a/src/getting-started/03.00.DEBUG.md b/src/getting-started/03.00.DEBUG.md
index 5a6af0a..7d11595 100644
--- a/src/getting-started/03.00.DEBUG.md
+++ b/src/getting-started/03.00.DEBUG.md
@@ -6,7 +6,7 @@ Before we start, let's add some code to debug:
 
 ``` rust
 // -- snip --
-entry!(main);
+#[entry]
 fn main() -> ! {
     let _y;
     let x = 42;