diff --git a/src/main.rs b/src/main.rs
index e7a11a9..408a6a8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,5 @@
+/// A "Hello, World!" program.
+
 fn main() {
     println!("Hello, world!");
 }