diff --git a/src/macros.rs b/src/macros.rs
index 353b9a2c3c..da553ee873 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -1,5 +1,8 @@
 #[allow(unknown_lints)]
-#[cfg_attr(not(any(feature = "full", feature = "derive")), allow(unused_macro_rules))]
+#[cfg_attr(
+    not(any(feature = "full", feature = "derive")),
+    allow(unused_macro_rules)
+)]
 macro_rules! ast_struct {
     (
         [$($attrs_pub:tt)*]