diff --git a/WindivertDotnet/WinDivertNative.cs b/WindivertDotnet/WinDivertNative.cs
index d36909a..b7f6726 100644
--- a/WindivertDotnet/WinDivertNative.cs
+++ b/WindivertDotnet/WinDivertNative.cs
@@ -68,7 +68,7 @@ public static extern bool WinDivertGetParam(
         public static extern int WinDivertHelperHashPacket(
             WinDivertPacket packet,
             int packetLen,
-            long seed = 0);
+            long seed);
 
         [DllImport(library, CallingConvention = CallingConvention.Cdecl, SetLastError = true)]
         public static extern bool WinDivertHelperParsePacket(
diff --git a/WindivertDotnet/WinDivertPacket.cs b/WindivertDotnet/WinDivertPacket.cs
index 679b825..d1a835b 100644
--- a/WindivertDotnet/WinDivertPacket.cs
+++ b/WindivertDotnet/WinDivertPacket.cs
@@ -103,12 +103,21 @@ public bool DecrementTTL()
             return WinDivertNative.WinDivertHelperDecrementTTL(this, this.length);
         }
 
+        /// <summary>
+        /// 获取包的哈希
+        /// </summary>
+        /// <returns></returns>
+        public override int GetHashCode()
+        {
+            return this.GetHashCode(seed: 0L);
+        }
+
         /// <summary>
         /// 获取包的哈希
         /// </summary>
         /// <param name="seed"></param>
         /// <returns></returns>
-        public int GetHash(long seed = 0L)
+        public int GetHashCode(long seed)
         {
             return WinDivertNative.WinDivertHelperHashPacket(this, this.length, seed);
         }