diff --git a/docs/csharp/language-reference/attributes/general.md b/docs/csharp/language-reference/attributes/general.md
index 00c1a14c18e36..49d1d2a2228dc 100644
--- a/docs/csharp/language-reference/attributes/general.md
+++ b/docs/csharp/language-reference/attributes/general.md
@@ -147,10 +147,16 @@ The constructor to the `AsyncMethodBuilder` attribute specifies the type of the
 * A `Start` method with the following API signature:
 
   ```csharp
-  void Start<TStateMachine>(ref TStateMachine stateMachine)
+  public void Start<TStateMachine>(ref TStateMachine stateMachine)
             where TStateMachine : System.Runtime.CompilerServices.IAsyncStateMachine
   ```
 
+* A `SetStateMachine` method with the following API signature:
+
+  ```csharp
+  public void SetStateMachine(System.Runtime.CompilerServices.IAsyncStateMachine stateMachine)
+  ```
+
 * An `AwaitOnCompleted` method with the following signature:
 
   ```csharp