diff --git a/zcash_client_backend/src/data_api.rs b/zcash_client_backend/src/data_api.rs
index 22bd169ca..355af9b4d 100644
--- a/zcash_client_backend/src/data_api.rs
+++ b/zcash_client_backend/src/data_api.rs
@@ -53,6 +53,16 @@ pub trait DBOps {
fn get_block_hash(&self, block_height: BlockHeight) -> Result