diff --git a/zebra-chain/src/orchard/keys.rs b/zebra-chain/src/orchard/keys.rs
index dc8fa31a9..6a847eff0 100644
--- a/zebra-chain/src/orchard/keys.rs
+++ b/zebra-chain/src/orchard/keys.rs
@@ -723,7 +723,7 @@ impl FromStr for FullViewingKey {
 }
 
 #[derive(Copy, Clone, PartialEq)]
-pub struct DiversifierKey();
+pub struct DiversifierKey([u8; 32]);
 
 /// An ephemeral public key for Orchard key agreement.
 ///