diff --git a/macros/src/lib.rs b/macros/src/lib.rs
index 9405ceede1..dc37eaea3c 100644
--- a/macros/src/lib.rs
+++ b/macros/src/lib.rs
@@ -15,7 +15,7 @@ mod tests;
 
 /// Attribute used to declare a RTIC application
 ///
-/// For user documentation see the [RTIC book](rtic.rs)
+/// For user documentation see the [RTIC book](https://rtic.rs)
 
 #[proc_macro_attribute]
 pub fn app(args: TokenStream, input: TokenStream) -> TokenStream {