diff --git a/src/Microsoft.AspNet.Server.Kestrel/Http/Frame.cs b/src/Microsoft.AspNet.Server.Kestrel/Http/Frame.cs
index 7bb0faa0e2..8dc2670a6a 100644
--- a/src/Microsoft.AspNet.Server.Kestrel/Http/Frame.cs
+++ b/src/Microsoft.AspNet.Server.Kestrel/Http/Frame.cs
@@ -32,7 +32,6 @@ namespace Microsoft.AspNet.Server.Kestrel.Http
         private readonly object _onStartingSync = new Object();
         private readonly object _onCompletedSync = new Object();
         private readonly FrameRequestHeaders _requestHeaders = new FrameRequestHeaders();
-        private readonly byte[] _nullBuffer = new byte[4096];
         private readonly FrameResponseHeaders _responseHeaders = new FrameResponseHeaders();
 
         private List<KeyValuePair<Func<object, Task>, object>> _onStarting;