diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
index c6d7fea443c35..f6ddaf379ba87 100644
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -244,16 +244,15 @@ static RPCHelpMan gettxoutproof()
         [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
 {
     std::set<uint256> setTxids;
-    uint256 oneTxid;
     UniValue txids = request.params[0].get_array();
+    if (txids.empty()) {
+        throw JSONRPCError(RPC_INVALID_PARAMETER, "Parameter 'txids' cannot be empty");
+    }
     for (unsigned int idx = 0; idx < txids.size(); idx++) {
-        const UniValue& txid = txids[idx];
-        uint256 hash(ParseHashV(txid, "txid"));
-        if (setTxids.count(hash)) {
-            throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated txid: ") + txid.get_str());
+        auto ret = setTxids.insert(ParseHashV(txids[idx], "txid"));
+        if (!ret.second) {
+            throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated txid: ") + txids[idx].get_str());
         }
-        setTxids.insert(hash);
-        oneTxid = hash;
     }
 
     CBlockIndex* pblockindex = nullptr;
@@ -287,7 +286,7 @@ static RPCHelpMan gettxoutproof()
     LOCK(cs_main);
 
     if (pblockindex == nullptr) {
-        const CTransactionRef tx = GetTransaction(/* block_index */ nullptr, /* mempool */ nullptr, oneTxid, Params().GetConsensus(), hashBlock);
+        const CTransactionRef tx = GetTransaction(/* block_index */ nullptr, /* mempool */ nullptr, *setTxids.begin(), Params().GetConsensus(), hashBlock);
         if (!tx || hashBlock.IsNull()) {
             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Transaction not yet in block");
         }
diff --git a/test/functional/rpc_txoutproof.py b/test/functional/rpc_txoutproof.py
index 93fb62c5d6cad..2d6ce77613fd0 100755
--- a/test/functional/rpc_txoutproof.py
+++ b/test/functional/rpc_txoutproof.py
@@ -78,7 +78,7 @@ def run_test(self):
         # We can't get a proof if we specify transactions from different blocks
         assert_raises_rpc_error(-5, "Not all transactions found in specified or retrieved block", self.nodes[0].gettxoutproof, [txid1, txid3])
         # Test empty list
-        assert_raises_rpc_error(-5, "Transaction not yet in block", self.nodes[0].gettxoutproof, [])
+        assert_raises_rpc_error(-8, "Parameter 'txids' cannot be empty", self.nodes[0].gettxoutproof, [])
         # Test duplicate txid
         assert_raises_rpc_error(-8, 'Invalid parameter, duplicated txid', self.nodes[0].gettxoutproof, [txid1, txid1])