diff --git a/src/JT809.Protocol/JT809Package.cs b/src/JT809.Protocol/JT809Package.cs
index 029b8df..3b428ec 100644
--- a/src/JT809.Protocol/JT809Package.cs
+++ b/src/JT809.Protocol/JT809Package.cs
@@ -92,7 +92,7 @@ namespace JT809.Protocol
                 }
             }
 
-            jT809Package.CRCCode = reader.CalculateCheckXorCode;
+            jT809Package.CRCCode = reader.ReadUInt16();
             jT809Package.EndFlag = reader.ReadEnd();
             return jT809Package;
         }