diff --git a/third_party/interlock/beijing11/msg.go b/third_party/interlock/beijing11/msg.go
index de06b10..3c48962 100644
--- a/third_party/interlock/beijing11/msg.go
+++ b/third_party/interlock/beijing11/msg.go
@@ -2,8 +2,8 @@ package beijing11
 
 import (
 	"encoding/binary"
+	"errors"
 	"fmt"
-	"joylink.club/bj-rtsts-server/sys_error"
 )
 
 // FromInterlockFrame 来自联锁的数据帧
@@ -27,7 +27,7 @@ type FromInterlockFrame struct {
 func (f *FromInterlockFrame) Decode(data []byte) error {
 	f.Len = binary.BigEndian.Uint16(data[1:3])
 	if int(f.Len) != len(data)-3 {
-		return sys_error.New(fmt.Sprintf("%s数据长度不对[%d:%d]", logTag, f.Len, len(data)-3))
+		return errors.New(fmt.Sprintf("%s数据长度不对[%d:%d]", logTag, f.Len, len(data)-3))
 	}
 	f.InterlockCode = binary.BigEndian.Uint16(data[3:5])
 	f.WaysideCode = binary.BigEndian.Uint16(data[5:7])