diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 593530af0..065e61448 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -222,6 +222,9 @@ UniValue blockToDeltasJSON(const CBlock& block, const CBlockIndex* blockindex)
 UniValue blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool txDetails = false)
 {
     AssertLockHeld(cs_main);
+    bool nu5Active = Params().GetConsensus().NetworkUpgradeActive(
+        blockindex->nHeight, Consensus::UPGRADE_NU5);
+
     UniValue result(UniValue::VOBJ);
     result.pushKV("hash", block.GetHash().GetHex());
     int confirmations = -1;
@@ -236,7 +239,9 @@ UniValue blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool tx
     result.pushKV("blockcommitments", blockindex->hashBlockCommitments.GetHex());
     result.pushKV("authdataroot", blockindex->hashAuthDataRoot.GetHex());
     result.pushKV("finalsaplingroot", blockindex->hashFinalSaplingRoot.GetHex());
-    result.pushKV("finalorchardroot", blockindex->hashFinalOrchardRoot.GetHex());
+    if (nu5Active) {
+        result.pushKV("finalorchardroot", blockindex->hashFinalOrchardRoot.GetHex());
+    }
     result.pushKV("chainhistoryroot", blockindex->hashChainHistoryRoot.GetHex());
     UniValue txs(UniValue::VARR);
     for (const CTransaction&tx : block.vtx)
@@ -707,6 +712,9 @@ UniValue getblock(const UniValue& params, bool fHelp)
             "  \"version\" : n,         (numeric) The block version\n"
             "  \"merkleroot\" : \"xxxx\", (string) The merkle root\n"
             "  \"finalsaplingroot\" : \"xxxx\", (string) The root of the Sapling commitment tree after applying this block\n"
+            "  \"finalorchardroot\" : \"xxxx\", (string) The root of the Orchard commitment tree after applying this block.\n"
+            "                                        Omitted for blocks prior to NU5 activation. This will be the null\n"
+            "                                        hash if this block has never been connected to a main chain.\n"
             "  \"tx\" : [               (array of string) The transaction ids\n"
             "     \"transactionid\"     (string) The transaction id\n"
             "     ,...\n"