diff --git a/zebra-chain/src/block.rs b/zebra-chain/src/block.rs
index 3b315ab7bfe..d472e930c7f 100644
--- a/zebra-chain/src/block.rs
+++ b/zebra-chain/src/block.rs
@@ -43,7 +43,10 @@ pub use arbitrary::LedgerState;
 
 /// A Zcash block, containing a header and a list of transactions.
 #[derive(Clone, Debug, Eq, PartialEq)]
-#[cfg_attr(any(test, feature = "proptest-impl", feature = "elasticsearch"), derive(Serialize))]
+#[cfg_attr(
+    any(test, feature = "proptest-impl", feature = "elasticsearch"),
+    derive(Serialize)
+)]
 pub struct Block {
     /// The block header, containing block metadata.
     pub header: Arc<Header>,