diff --git a/neo/Network/RPC/RpcServer.cs b/neo/Network/RPC/RpcServer.cs
index 0f22ad4851..5a12f190ba 100644
--- a/neo/Network/RPC/RpcServer.cs
+++ b/neo/Network/RPC/RpcServer.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.IO.Compression;
@@ -127,8 +127,10 @@ private static JObject GetRelayResult(RelayResultReason reason)
                     throw new RpcException(-503, "The block cannot be validated.");
                 case RelayResultReason.Invalid:
                     throw new RpcException(-504, "Block or transaction validation failed.");
+                case RelayResultReason.PolicyFail:
+                    throw new RpcException(-505, "One of the Policy filters failed.");
                 default:
-                    throw new RpcException(-500, "Unkown error.");
+                    throw new RpcException(-500, "Unknown error.");
             }
         }