diff --git a/zebra-chain/src/commitments/sapling.rs b/zebra-chain/src/commitments/sapling.rs
index 88dbdc4cd..b7ba05482 100644
--- a/zebra-chain/src/commitments/sapling.rs
+++ b/zebra-chain/src/commitments/sapling.rs
@@ -220,6 +220,9 @@ impl NoteCommitment {
 
         // Jubjub repr_J canonical byte encoding
         // https://zips.z.cash/protocol/protocol.pdf#jubjub
+        //
+        // The `From<Diversifier>` impls for the `jubjub::*Point`s handles
+        // calling `DiversifyHash` implicitly.
         let g_d_bytes = jubjub::AffinePoint::from(diversifier).to_bytes();
         let pk_d_bytes = <[u8; 32]>::from(transmission_key);
         let v_bytes = value.to_bytes();
diff --git a/zebra-chain/src/keys/sapling.rs b/zebra-chain/src/keys/sapling.rs
index 6832b4192..9c2b89c5f 100644
--- a/zebra-chain/src/keys/sapling.rs
+++ b/zebra-chain/src/keys/sapling.rs
@@ -155,7 +155,7 @@ fn zcash_h() -> jubjub::ExtendedPoint {
 /// Used to derive a diversified base point from a diversifier value.
 ///
 /// https://zips.z.cash/protocol/protocol.pdf#concretediversifyhash
-pub fn diversify_hash(d: [u8; 11]) -> Option<jubjub::ExtendedPoint> {
+fn diversify_hash(d: [u8; 11]) -> Option<jubjub::ExtendedPoint> {
     jubjub_group_hash(*b"Zcash_gd", &d)
 }