diff --git a/CSharp/Library/Form/FormDialog.cs b/CSharp/Library/Form/FormDialog.cs
index 4db0f32bf..13778e257 100644
--- a/CSharp/Library/Form/FormDialog.cs
+++ b/CSharp/Library/Form/FormDialog.cs
@@ -342,7 +342,7 @@ namespace Microsoft.Bot.Builder.Form
                 {
                     if (_form.Completion != null)
                     {
-                        _form.Completion(context, _state);
+                        await _form.Completion(context, _state);
                     }
                     context.Done(_state);
                 }