diff --git a/src/core_io.h b/src/core_io.h
index 1d19461e53..170f927428 100644
--- a/src/core_io.h
+++ b/src/core_io.h
@@ -47,6 +47,6 @@ std::string EncodeHexTx(const CTransaction& tx);
 std::string SighashToStr(unsigned char sighash_type);
 void ScriptPubKeyToUniv(const CScript& scriptPubKey, UniValue& out, bool fIncludeHex);
 void ScriptToUniv(const CScript& script, UniValue& out, bool include_address);
-void TxToUniv(const CTransaction& tx, const uint256& hashBlock, UniValue& entry, bool include_hex = true, const CSpentIndexTxInfo* ptxSpentInfo = nullptr, const CTxUndo* txundo = nullptr);
+void TxToUniv(const CTransaction& tx, const uint256& hashBlock, UniValue& entry, bool include_hex = true, const CTxUndo* txundo = nullptr, const CSpentIndexTxInfo* ptxSpentInfo = nullptr);
 
 #endif // BITCOIN_CORE_IO_H
diff --git a/src/core_write.cpp b/src/core_write.cpp
index c27b0c0f58..e921643f72 100644
--- a/src/core_write.cpp
+++ b/src/core_write.cpp
@@ -192,7 +192,7 @@ void ScriptPubKeyToUniv(const CScript& scriptPubKey,
     out.pushKV("addresses", a);
 }
 
-void TxToUniv(const CTransaction& tx, const uint256& hashBlock, UniValue& entry, bool include_hex, const CSpentIndexTxInfo* ptxSpentInfo, const CTxUndo* txundo)
+void TxToUniv(const CTransaction& tx, const uint256& hashBlock, UniValue& entry, bool include_hex, const CTxUndo* txundo, const CSpentIndexTxInfo* ptxSpentInfo)
 {
     uint256 txid = tx.GetHash();
     entry.pushKV("txid", txid.GetHex());
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 49b39817f1..6749f8ac4b 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -226,7 +226,7 @@ UniValue blockToJSON(const CBlock& block, const CBlockIndex* tip, const CBlockIn
             // coinbase transaction (i == 0) doesn't have undo data
             const CTxUndo* txundo = (have_undo && i) ? &blockUndo.vtxundo.at(i - 1) : nullptr;
             UniValue objTx(UniValue::VOBJ);
-            TxToUniv(*tx, uint256(), objTx, true, nullptr, txundo);
+            TxToUniv(*tx, uint256(), objTx, true, txundo);
             bool fLocked = isman.IsLocked(tx->GetHash());
             objTx.pushKV("instantlock", fLocked || result["chainlock"].get_bool());
             objTx.pushKV("instantlock_internal", fLocked);
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
index 3222098339..c70fca08e9 100644
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -84,7 +84,7 @@ void TxToJSON(const CTransaction& tx, const uint256 hashBlock, CTxMemPool& mempo
         }
     }
 
-    TxToUniv(tx, uint256(), entry, true, &txSpentInfo);
+    TxToUniv(tx, uint256(), entry, true, /* txundo = */ nullptr, &txSpentInfo);
 
     bool chainLock = false;
     if (!hashBlock.IsNull()) {