diff --git a/src/IISIntegration/src/Microsoft.AspNetCore.Server.IISIntegration/IISDefaults.cs b/src/IISIntegration/src/Microsoft.AspNetCore.Server.IISIntegration/IISDefaults.cs
index 957273c094..f34da18d1e 100644
--- a/src/IISIntegration/src/Microsoft.AspNetCore.Server.IISIntegration/IISDefaults.cs
+++ b/src/IISIntegration/src/Microsoft.AspNetCore.Server.IISIntegration/IISDefaults.cs
@@ -5,7 +5,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
 {
     public class IISDefaults
     {
-        public static readonly string AuthenticationScheme = "Windows";
+        public const string AuthenticationScheme = "Windows";
         public const string Negotiate = "Negotiate";
         public const string Ntlm = "NTLM";
     }
diff --git a/src/IISIntegration/src/Microsoft.AspNetCore.Server.IISIntegration/breakingchanges.netcore.json b/src/IISIntegration/src/Microsoft.AspNetCore.Server.IISIntegration/breakingchanges.netcore.json
new file mode 100644
index 0000000000..31cdd9c09b
--- /dev/null
+++ b/src/IISIntegration/src/Microsoft.AspNetCore.Server.IISIntegration/breakingchanges.netcore.json
@@ -0,0 +1,7 @@
+[
+    {
+        "TypeId": "public class Microsoft.AspNetCore.Server.IISIntegration.IISDefaults",
+        "MemberId": "public static readonly System.String AuthenticationScheme",
+        "Kind": "Removal"
+    }
+]
\ No newline at end of file