diff --git a/src/Ocelot/Middleware/Multiplexer/IDefinedAggregator.cs b/src/Ocelot/Middleware/Multiplexer/IDefinedAggregator.cs
index b1585165..48234782 100644
--- a/src/Ocelot/Middleware/Multiplexer/IDefinedAggregator.cs
+++ b/src/Ocelot/Middleware/Multiplexer/IDefinedAggregator.cs
@@ -5,6 +5,6 @@ namespace Ocelot.Middleware.Multiplexer
 {
     public interface IDefinedAggregator
     {
-        Task<DownstreamResponse> Aggregate(List<DownstreamResponse> responses);
+        Task<DownstreamResponse> Aggregate(List<DownstreamContext> responses);
     }
 }
diff --git a/src/Ocelot/Middleware/Multiplexer/UserDefinedResponseAggregator.cs b/src/Ocelot/Middleware/Multiplexer/UserDefinedResponseAggregator.cs
index aa44466d..0080b60e 100644
--- a/src/Ocelot/Middleware/Multiplexer/UserDefinedResponseAggregator.cs
+++ b/src/Ocelot/Middleware/Multiplexer/UserDefinedResponseAggregator.cs
@@ -1,5 +1,4 @@
 using System.Collections.Generic;
-using System.Linq;
 using System.Threading.Tasks;
 using Ocelot.Configuration;
 
@@ -21,7 +20,7 @@ namespace Ocelot.Middleware.Multiplexer
             if (!aggregator.IsError)
             {
                 var aggregateResponse = await aggregator.Data
-                    .Aggregate(downstreamResponses.Select(x => x.DownstreamResponse).ToList());
+                    .Aggregate(downstreamResponses);
 
                 originalContext.DownstreamResponse = aggregateResponse;
             }
diff --git a/test/Ocelot.AcceptanceTests/AggregateTests.cs b/test/Ocelot.AcceptanceTests/AggregateTests.cs
index e3d99854..6de4d8c7 100644
--- a/test/Ocelot.AcceptanceTests/AggregateTests.cs
+++ b/test/Ocelot.AcceptanceTests/AggregateTests.cs
@@ -646,14 +646,14 @@ namespace Ocelot.AcceptanceTests
             _dep = dep;
         }
 
-        public async Task<DownstreamResponse> Aggregate(List<DownstreamResponse> responses)
+        public async Task<DownstreamResponse> Aggregate(List<DownstreamContext> responses)
         {
-            var one = await responses[0].Content.ReadAsStringAsync();
-            var two = await responses[1].Content.ReadAsStringAsync();
+            var one = await responses[0].DownstreamResponse.Content.ReadAsStringAsync();
+            var two = await responses[1].DownstreamResponse.Content.ReadAsStringAsync();
 
             var merge = $"{one}, {two}";
             merge = merge.Replace("Hello", "Bye").Replace("{", "").Replace("}", "");
-            var headers = responses.SelectMany(x => x.Headers).ToList();
+            var headers = responses.SelectMany(x => x.DownstreamResponse.Headers).ToList();
             return new DownstreamResponse(new StringContent(merge), HttpStatusCode.OK, headers, "some reason");
         }
     }
diff --git a/test/Ocelot.UnitTests/Middleware/UserDefinedResponseAggregatorTests.cs b/test/Ocelot.UnitTests/Middleware/UserDefinedResponseAggregatorTests.cs
index daef2a2c..4ebb592c 100644
--- a/test/Ocelot.UnitTests/Middleware/UserDefinedResponseAggregatorTests.cs
+++ b/test/Ocelot.UnitTests/Middleware/UserDefinedResponseAggregatorTests.cs
@@ -140,12 +140,12 @@ namespace Ocelot.UnitTests.Middleware
 
         public class TestDefinedAggregator : IDefinedAggregator
         {
-            public async Task<DownstreamResponse> Aggregate(List<DownstreamResponse> responses)
+            public async Task<DownstreamResponse> Aggregate(List<DownstreamContext> responses)
             {
-                var tom = await responses[0].Content.ReadAsStringAsync();
-                var laura = await responses[1].Content.ReadAsStringAsync();
+                var tom = await responses[0].DownstreamResponse.Content.ReadAsStringAsync();
+                var laura = await responses[1].DownstreamResponse.Content.ReadAsStringAsync();
                 var content = $"{tom}, {laura}";
-                var headers = responses.SelectMany(x => x.Headers).ToList();
+                var headers = responses.SelectMany(x => x.DownstreamResponse.Headers).ToList();
                 return new DownstreamResponse(new StringContent(content), HttpStatusCode.OK, headers, "some reason");
             }
         }