diff --git a/src/Nethermind/Nethermind.Core/Extensions/Bytes.cs b/src/Nethermind/Nethermind.Core/Extensions/Bytes.cs
index 219adaaf2dc..4e547fcaee9 100644
--- a/src/Nethermind/Nethermind.Core/Extensions/Bytes.cs
+++ b/src/Nethermind/Nethermind.Core/Extensions/Bytes.cs
@@ -277,6 +277,14 @@ public static byte[] PadRight(this byte[] bytes, int length)
             return result;
         }
 
+        public static byte[] Concat(byte[] part1, byte[] part2)
+        {
+            byte[] result = new byte[part1.Length + part2.Length];
+            part1.CopyTo(result, 0);
+            part2.CopyTo(result.AsSpan(part1.Length));
+            return result;
+        }
+
         public static byte[] Concat(params byte[][] parts)
         {
             int totalLength = 0;