diff --git a/src/GeekLearning.RestKit.Core/ClientBase.cs b/src/GeekLearning.RestKit.Core/ClientBase.cs
index ddaf158..39c8f1d 100644
--- a/src/GeekLearning.RestKit.Core/ClientBase.cs
+++ b/src/GeekLearning.RestKit.Core/ClientBase.cs
@@ -41,12 +41,19 @@ protected HttpClient GetClient()
 
         protected Task<TTarget> TransformResponseAsync<TTarget>(HttpResponseMessage message)
         {
-            IMediaFormatter mediaFormatter = this.mediaFormatterProvider.GetMediaFormatter(message.Content.Headers.ContentType);
-            if (mediaFormatter == null)
+            if (message.Content != null)
+            {
+                IMediaFormatter mediaFormatter = this.mediaFormatterProvider.GetMediaFormatter(message.Content.Headers.ContentType);
+                if (mediaFormatter == null)
+                {
+                    throw new UnsupportedMediaTypeApiException(message);
+                }
+                return mediaFormatter.TransformAsync<TTarget>(message.Content);
+            }
+            else
             {
-                throw new UnsupportedMediaTypeApiException(message);
+                return Task.FromResult(default(TTarget));
             }
-            return mediaFormatter.TransformAsync<TTarget>(message.Content);
         }
 
         protected HttpRequestMessage ApplyFilters(HttpRequestMessage requestMessage, params string[] securityDefinitions)