diff --git a/client/src/client.rs b/client/src/client.rs
index b6394f8a..5e73e2a0 100644
--- a/client/src/client.rs
+++ b/client/src/client.rs
@@ -270,6 +270,14 @@ pub trait RpcApi: Sized {
     fn get_block_header_info(
         &self,
         hash: &BlockHash,
+    ) -> Result<json::GetBlockHeaderResult> {
+        self.call("getblockheader", &[into_json(hash)?, 1.into()])
+    }
+
+    /// Returns information about the block header, including merkle-root and coinbase tx.
+    fn get_block_header_info_full(
+        &self,
+        hash: &BlockHash,
     ) -> Result<json::GetBlockHeaderResult> {
         self.call("getblockheader", &[into_json(hash)?, 2.into()])
     }
diff --git a/json/src/lib.rs b/json/src/lib.rs
index 486eee01..d03b7adc 100644
--- a/json/src/lib.rs
+++ b/json/src/lib.rs
@@ -340,9 +340,9 @@ pub struct GetBlockHeaderResult {
     pub next_block_hash: Option<BlockHash>,
     pub status: GetBlockResultStatus,
     #[serde(rename = "tx")]
-    pub coinbase_tx: Vec<GetRawTransactionResult>,  /// its a vector but it only has one value
+    pub coinbase_tx: Option<Vec<GetRawTransactionResult>>,  // its a vector but it only has one value
     #[serde(rename = "merkleproof")]
-    pub coinbase_merkle_proof: Vec<Hash>,
+    pub coinbase_merkle_proof: Option<Vec<Hash>>,
 }
 
 #[derive(Clone, PartialEq, Debug, Deserialize, Serialize)]