diff --git a/FastGithub.PacketIntercept/Dns/DnsInterceptor.cs b/FastGithub.PacketIntercept/Dns/DnsInterceptor.cs
index 398c3b5..15284b6 100644
--- a/FastGithub.PacketIntercept/Dns/DnsInterceptor.cs
+++ b/FastGithub.PacketIntercept/Dns/DnsInterceptor.cs
@@ -60,7 +60,7 @@ namespace FastGithub.PacketIntercept.Dns
             await Task.Yield();
 
             var handle = WinDivert.WinDivertOpen(DNS_FILTER, WinDivertLayer.Network, 0, WinDivertOpenFlags.None);
-            if (handle == IntPtr.Zero)
+            if (handle == IntPtr.MaxValue || handle == IntPtr.Zero)
             {
                 return;
             }
diff --git a/FastGithub.PacketIntercept/Tcp/TcpInterceptor.cs b/FastGithub.PacketIntercept/Tcp/TcpInterceptor.cs
index ef83e85..017d5c3 100644
--- a/FastGithub.PacketIntercept/Tcp/TcpInterceptor.cs
+++ b/FastGithub.PacketIntercept/Tcp/TcpInterceptor.cs
@@ -48,7 +48,7 @@ namespace FastGithub.PacketIntercept.Tcp
             await Task.Yield();
 
             var handle = WinDivert.WinDivertOpen(this.filter, WinDivertLayer.Network, 0, WinDivertOpenFlags.None);
-            if (handle == IntPtr.Zero)
+            if (handle == IntPtr.MaxValue || handle == IntPtr.Zero)
             {
                 return;
             }