diff --git a/docs/en/framework/infrastructure/features.md b/docs/en/framework/infrastructure/features.md
index ef5d97bd91..a6bc52e48b 100644
--- a/docs/en/framework/infrastructure/features.md
+++ b/docs/en/framework/infrastructure/features.md
@@ -424,7 +424,7 @@ namespace FeaturesDemo
                 return Task.FromResult("true");
             }
 
-            return null;
+            return Task.FromResult<string>(null);
         }
     }
 }