diff --git a/rpc/codec/json.go b/rpc/codec/json.go
index b5ef94380..a4953a59c 100644
--- a/rpc/codec/json.go
+++ b/rpc/codec/json.go
@@ -156,15 +156,15 @@ func (self *JsonCodec) ReadResponse() (interface{}, error) {
 		}
 		bytesInBuffer += n
 
+		var failure shared.ErrorResponse
+		if err = json.Unmarshal(buf[:bytesInBuffer], &failure); err == nil && failure.Error != nil {
+			return failure, fmt.Errorf(failure.Error.Message)
+		}
+
 		var success shared.SuccessResponse
 		if err = json.Unmarshal(buf[:bytesInBuffer], &success); err == nil {
 			return success, nil
 		}
-
-		var failure shared.ErrorResponse
-		if err = json.Unmarshal(buf[:bytesInBuffer], &failure); err == nil && failure.Error != nil {
-			return failure, nil
-		}
 	}
 
 	self.c.Close()
diff --git a/rpc/jeth.go b/rpc/jeth.go
index 33fcd6efd..78e44c4da 100644
--- a/rpc/jeth.go
+++ b/rpc/jeth.go
@@ -3,6 +3,8 @@ package rpc
 import (
 	"encoding/json"
 
+	"fmt"
+
 	"github.com/ethereum/go-ethereum/jsre"
 	"github.com/ethereum/go-ethereum/rpc/comms"
 	"github.com/ethereum/go-ethereum/rpc/shared"
@@ -20,14 +22,13 @@ func NewJeth(ethApi shared.EthereumApi, re *jsre.JSRE, client comms.EthereumClie
 }
 
 func (self *Jeth) err(call otto.FunctionCall, code int, msg string, id interface{}) (response otto.Value) {
-	rpcerr := &shared.ErrorObject{code, msg}
-	call.Otto.Set("ret_jsonrpc", shared.JsonRpcVersion)
-	call.Otto.Set("ret_id", id)
-	call.Otto.Set("ret_error", rpcerr)
-	response, _ = call.Otto.Run(`
-		ret_response = { jsonrpc: ret_jsonrpc, id: ret_id, error: ret_error };
-	`)
-	return
+	errObj := fmt.Sprintf("{\"message\": \"%s\", \"code\": %d}", msg, code)
+	retResponse := fmt.Sprintf("ret_response = JSON.parse('{\"jsonrpc\": \"%s\", \"id\": %v, \"error\": %s}');", shared.JsonRpcVersion, id, errObj)
+
+	call.Otto.Run("ret_error = " + errObj)
+	res, _ := call.Otto.Run(retResponse)
+
+	return res
 }
 
 func (self *Jeth) Send(call otto.FunctionCall) (response otto.Value) {
@@ -56,6 +57,7 @@ func (self *Jeth) Send(call otto.FunctionCall) (response otto.Value) {
 			return self.err(call, -32603, err.Error(), req.Id)
 		}
 		respif, err = self.client.Recv()
+
 		if err != nil {
 			return self.err(call, -32603, err.Error(), req.Id)
 		}