diff --git a/src/Nethermind/Nethermind.Taiko.Test/TaikoExtendedEthModuleTests.cs b/src/Nethermind/Nethermind.Taiko.Test/TaikoExtendedEthModuleTests.cs
index 7d73311c7355..d6b28a67760c 100644
--- a/src/Nethermind/Nethermind.Taiko.Test/TaikoExtendedEthModuleTests.cs
+++ b/src/Nethermind/Nethermind.Taiko.Test/TaikoExtendedEthModuleTests.cs
@@ -78,4 +78,37 @@ public void TestL1OriginById_WithBuildPayloadArgsId()
 
         rpc.taiko_l1OriginByID(0).Result.Data.Should().Be(origin);
     }
+
+    [Test]
+    public void TestL1OriginById_ValueHash256_EvenLengthHex()
+    {
+        IL1OriginStore originStore = Substitute.For<IL1OriginStore>();
+        TaikoExtendedEthModule rpc = new TaikoExtendedEthModule(new SyncConfig(), originStore);
+        int expectedLengthInChars = Hash256.Size * 2 + 2;
+
+        // Create odd length hash values
+        var l2BlockHash = new Hash256("0x35a48c5b3ee5b1b2a365fcd1aa68c738d1c06474578087a78fa79dd45de6214");
+        var l1BlockHash = new Hash256("0x2daf7e4b06ca2d3a82c775d9e9ad0c973545a608684146cda0df5f7d71188a5");
+
+        L1Origin origin = new L1Origin(0, l2BlockHash, 1, l1BlockHash, null);
+        originStore.ReadL1Origin((UInt256)0).Returns(origin);
+
+        var result = rpc.taiko_l1OriginByID(0).Result.Data;
+        result.Should().Be(origin);
+
+        // Serialize the RPC result and verify hash values have even-length hex string
+        var serializer = new Serialization.Json.EthereumJsonSerializer();
+        var json = serializer.Serialize(result);
+
+        // Parse the JSON to extract the hash values
+        var jsonDoc = System.Text.Json.JsonDocument.Parse(json);
+        var l2BlockHashString = jsonDoc.RootElement.GetProperty("l2BlockHash").GetString();
+        var l1BlockHashString = jsonDoc.RootElement.GetProperty("l1BlockHash").GetString();
+
+        l2BlockHashString.Should().NotBeNull();
+        l2BlockHashString!.Length.Should().Be(expectedLengthInChars);
+
+        l1BlockHashString.Should().NotBeNull();
+        l1BlockHashString!.Length.Should().Be(expectedLengthInChars);
+    }
 }
diff --git a/src/Nethermind/Nethermind.Taiko/L1Origin.cs b/src/Nethermind/Nethermind.Taiko/L1Origin.cs
index c145af481bac..713c07dbe59f 100644
--- a/src/Nethermind/Nethermind.Taiko/L1Origin.cs
+++ b/src/Nethermind/Nethermind.Taiko/L1Origin.cs
@@ -6,10 +6,10 @@
 
 namespace Nethermind.Taiko;
 
-public class L1Origin(UInt256 blockId, ValueHash256? l2BlockHash, long l1BlockHeight, Hash256 l1BlockHash, int[]? buildPayloadArgsId)
+public class L1Origin(UInt256 blockId, Hash256? l2BlockHash, long l1BlockHeight, Hash256 l1BlockHash, int[]? buildPayloadArgsId)
 {
     public UInt256 BlockId { get; set; } = blockId;
-    public ValueHash256? L2BlockHash { get; set; } = l2BlockHash;
+    public Hash256? L2BlockHash { get; set; } = l2BlockHash;
     public long L1BlockHeight { get; set; } = l1BlockHeight;
     public Hash256 L1BlockHash { get; set; } = l1BlockHash;