diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/AuthenticationHelper.NtAuth.cs b/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/AuthenticationHelper.NtAuth.cs
index c16c2b18b9012..74abe97e80de9 100644
--- a/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/AuthenticationHelper.NtAuth.cs
+++ b/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/AuthenticationHelper.NtAuth.cs
@@ -119,7 +119,7 @@ private static async Task<HttpResponseMessage> SendWithNtAuthAsync(HttpRequestMe
                         }
 
                         ChannelBinding? channelBinding = connection.TransportContext?.GetChannelBinding(ChannelBindingKind.Endpoint);
-                        NTAuthentication authContext = new NTAuthentication(isServer: false, challenge.SchemeName, challenge.Credential, spn, ContextFlagsPal.Connection, channelBinding);
+                        NTAuthentication authContext = new NTAuthentication(isServer: false, challenge.SchemeName, challenge.Credential, spn, ContextFlagsPal.Connection | ContextFlagsPal.InitIntegrity, channelBinding);
                         string? challengeData = challenge.ChallengeData;
                         try
                         {