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 52edbb5a80cba..09bee9a195256 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
@@ -61,7 +61,7 @@ private static bool ProxySupportsConnectionAuth(HttpResponseMessage response)
 
             foreach (string v in values)
             {
-                if (v == "Session-Based-Authentication")
+                if (v.Equals("Session-Based-Authentication", StringComparison.OrdinalIgnoreCase))
                 {
                     return true;
                 }