diff --git a/Octokit.Reactive/Helpers/ObservableExtensions.cs b/Octokit.Reactive/Helpers/ObservableExtensions.cs
index 3972925f..ad3b1435 100644
--- a/Octokit.Reactive/Helpers/ObservableExtensions.cs
+++ b/Octokit.Reactive/Helpers/ObservableExtensions.cs
@@ -63,7 +63,7 @@ namespace Octokit.Reactive.Internal
                     {
                         m.Disposable = scheduler.Schedule(self =>
                         {
-                            var work = default(IObservable<TSource>);
+                            IObservable<TSource> work;
 
                             lock (q)
                             {
diff --git a/Octokit/Http/SimpleJsonSerializer.cs b/Octokit/Http/SimpleJsonSerializer.cs
index 69380ce3..d31c3dd5 100644
--- a/Octokit/Http/SimpleJsonSerializer.cs
+++ b/Octokit/Http/SimpleJsonSerializer.cs
@@ -81,7 +81,7 @@ namespace Octokit.Internal
                 return p.ToString().ToLowerInvariant();
             }
 
-            private string _type = null;
+            private string _type;
 
             // Overridden to handle enums.
             public override object DeserializeObject(object value, Type type)