diff --git a/release-notes/2.1/2.1.0-preview1.md b/release-notes/2.1/2.1.0-preview1.md
index 0c9710c99c..43063235b1 100644
--- a/release-notes/2.1/2.1.0-preview1.md
+++ b/release-notes/2.1/2.1.0-preview1.md
@@ -74,7 +74,7 @@ public class ActiveDirectoryAuthenticationProvider
     public void SetParentActivityOrWindowFunc(Func<object> parentActivityOrWindowFunc);
 
     // For .NET Framework, .NET Core and .NET Standard targeted applications
-    public void SetCustomWebUi(ICustomWebUi customWebUi);
+    public void SetAcquireAuthorizationCodeAsyncCallback(Func<Uri, Uri, CancellationToken, Task<Uri>> acquireAuthorizationCodeAsyncCallback);
 }
 ```