diff --git a/src/JsonApiDotNetCore/Middleware/IControllerResourceMapping.cs b/src/JsonApiDotNetCore/Middleware/IControllerResourceMapping.cs
index 28719247a9..6f4a8beb7a 100644
--- a/src/JsonApiDotNetCore/Middleware/IControllerResourceMapping.cs
+++ b/src/JsonApiDotNetCore/Middleware/IControllerResourceMapping.cs
@@ -8,8 +8,8 @@ namespace JsonApiDotNetCore.Middleware
     public interface IControllerResourceMapping
     {
         /// <summary>
-        /// Get the associated resource type for the provided controller name.
+        /// Get the associated resource type for the provided controller type.
         /// </summary>
-        Type GetResourceTypeForController(string controllerName);
+        Type GetResourceTypeForController(Type controllerType);
     }
 }
diff --git a/src/JsonApiDotNetCore/Middleware/JsonApiMiddleware.cs b/src/JsonApiDotNetCore/Middleware/JsonApiMiddleware.cs
index 85796ef54f..0043e4064d 100644
--- a/src/JsonApiDotNetCore/Middleware/JsonApiMiddleware.cs
+++ b/src/JsonApiDotNetCore/Middleware/JsonApiMiddleware.cs
@@ -14,6 +14,7 @@
 using JsonApiDotNetCore.Serialization.Objects;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Controllers;
 using Microsoft.AspNetCore.Routing;
 using Microsoft.Extensions.Primitives;
 using Newtonsoft.Json;
@@ -47,7 +48,7 @@ public async Task InvokeAsync(HttpContext httpContext, IControllerResourceMappin
 
             RouteValueDictionary routeValues = httpContext.GetRouteData().Values;
 
-            ResourceContext primaryResourceContext = CreatePrimaryResourceContext(routeValues, controllerResourceMapping, resourceContextProvider);
+            ResourceContext primaryResourceContext = CreatePrimaryResourceContext(httpContext, controllerResourceMapping, resourceContextProvider);
 
             if (primaryResourceContext != null)
             {
@@ -77,14 +78,16 @@ public async Task InvokeAsync(HttpContext httpContext, IControllerResourceMappin
             await _next(httpContext);
         }
 
-        private static ResourceContext CreatePrimaryResourceContext(RouteValueDictionary routeValues, IControllerResourceMapping controllerResourceMapping,
+        private static ResourceContext CreatePrimaryResourceContext(HttpContext httpContext, IControllerResourceMapping controllerResourceMapping,
             IResourceContextProvider resourceContextProvider)
         {
-            string controllerName = (string)routeValues["controller"];
+            Endpoint endpoint = httpContext.GetEndpoint();
+            var controllerActionDescriptor = endpoint?.Metadata.GetMetadata<ControllerActionDescriptor>();
 
-            if (controllerName != null)
+            if (controllerActionDescriptor != null)
             {
-                Type resourceType = controllerResourceMapping.GetResourceTypeForController(controllerName);
+                Type controllerType = controllerActionDescriptor.ControllerTypeInfo;
+                Type resourceType = controllerResourceMapping.GetResourceTypeForController(controllerType);
 
                 if (resourceType != null)
                 {
diff --git a/src/JsonApiDotNetCore/Middleware/JsonApiRoutingConvention.cs b/src/JsonApiDotNetCore/Middleware/JsonApiRoutingConvention.cs
index c9abf109c1..80e2aa5dce 100644
--- a/src/JsonApiDotNetCore/Middleware/JsonApiRoutingConvention.cs
+++ b/src/JsonApiDotNetCore/Middleware/JsonApiRoutingConvention.cs
@@ -34,7 +34,7 @@ public class JsonApiRoutingConvention : IJsonApiRoutingConvention
         private readonly IJsonApiOptions _options;
         private readonly IResourceContextProvider _resourceContextProvider;
         private readonly HashSet<string> _registeredTemplates = new HashSet<string>();
-        private readonly Dictionary<string, ResourceContext> _registeredResources = new Dictionary<string, ResourceContext>();
+        private readonly Dictionary<Type, ResourceContext> _resourceContextPerControllerTypeMap = new Dictionary<Type, ResourceContext>();
 
         public JsonApiRoutingConvention(IJsonApiOptions options, IResourceContextProvider resourceContextProvider)
         {
@@ -46,11 +46,11 @@ public JsonApiRoutingConvention(IJsonApiOptions options, IResourceContextProvide
         }
 
         /// <inheritdoc />
-        public Type GetResourceTypeForController(string controllerName)
+        public Type GetResourceTypeForController(Type controllerType)
         {
-            ArgumentGuard.NotNullNorEmpty(controllerName, nameof(controllerName));
+            ArgumentGuard.NotNull(controllerType, nameof(controllerType));
 
-            if (_registeredResources.TryGetValue(controllerName, out ResourceContext resourceContext))
+            if (_resourceContextPerControllerTypeMap.TryGetValue(controllerType, out ResourceContext resourceContext))
             {
                 return resourceContext.ResourceType;
             }
@@ -77,7 +77,7 @@ public void Apply(ApplicationModel application)
 
                         if (resourceContext != null)
                         {
-                            _registeredResources.Add(controller.ControllerName, resourceContext);
+                            _resourceContextPerControllerTypeMap.Add(controller.ControllerType, resourceContext);
                         }
                     }
                 }
@@ -112,7 +112,7 @@ private bool IsRoutingConventionEnabled(ControllerModel controller)
         /// </summary>
         private string TemplateFromResource(ControllerModel model)
         {
-            if (_registeredResources.TryGetValue(model.ControllerName, out ResourceContext resourceContext))
+            if (_resourceContextPerControllerTypeMap.TryGetValue(model.ControllerType, out ResourceContext resourceContext))
             {
                 string template = $"{_options.Namespace}/{resourceContext.PublicName}";
 
diff --git a/test/UnitTests/Middleware/JsonApiMiddlewareTests.cs b/test/UnitTests/Middleware/JsonApiMiddlewareTests.cs
index 9df692d51c..0f331b0a6f 100644
--- a/test/UnitTests/Middleware/JsonApiMiddlewareTests.cs
+++ b/test/UnitTests/Middleware/JsonApiMiddlewareTests.cs
@@ -1,12 +1,14 @@
 using System;
 using System.IO;
 using System.Linq;
+using System.Reflection;
 using System.Threading.Tasks;
 using JsonApiDotNetCore.Configuration;
 using JsonApiDotNetCore.Middleware;
 using JsonApiDotNetCore.Resources.Annotations;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Http.Features;
+using Microsoft.AspNetCore.Mvc.Controllers;
 using Moq;
 using Moq.Language;
 using Xunit;
@@ -96,7 +98,7 @@ private InvokeConfiguration GetConfiguration(string path, string resourceName =
 
             const string forcedNamespace = "api/v1";
             var mockMapping = new Mock<IControllerResourceMapping>();
-            mockMapping.Setup(mapping => mapping.GetResourceTypeForController(It.IsAny<string>())).Returns(typeof(string));
+            mockMapping.Setup(mapping => mapping.GetResourceTypeForController(It.IsAny<Type>())).Returns(typeof(string));
 
             Mock<IJsonApiOptions> mockOptions = CreateMockOptions(forcedNamespace);
             Mock<IResourceGraph> mockGraph = CreateMockResourceGraph(resourceName, relType != null);
@@ -151,7 +153,13 @@ private static DefaultHttpContext CreateHttpContext(string path, bool isRelation
             }
 
             context.Features.Set<IRouteValuesFeature>(feature);
-            context.SetEndpoint(new Endpoint(null, new EndpointMetadataCollection(), null));
+
+            var controllerActionDescriptor = new ControllerActionDescriptor
+            {
+                ControllerTypeInfo = (TypeInfo)typeof(object)
+            };
+
+            context.SetEndpoint(new Endpoint(null, new EndpointMetadataCollection(controllerActionDescriptor), null));
             return context;
         }
 
diff --git a/test/UnitTests/Middleware/JsonApiRequestTests.cs b/test/UnitTests/Middleware/JsonApiRequestTests.cs
index 092e0d4ad3..7bd2ffcbb5 100644
--- a/test/UnitTests/Middleware/JsonApiRequestTests.cs
+++ b/test/UnitTests/Middleware/JsonApiRequestTests.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Linq;
+using System.Reflection;
 using System.Threading.Tasks;
 using FluentAssertions;
 using JsonApiDotNetCore.Configuration;
@@ -7,6 +8,7 @@
 using JsonApiDotNetCoreExample.Models;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Http.Features;
+using Microsoft.AspNetCore.Mvc.Controllers;
 using Microsoft.Extensions.Logging.Abstractions;
 using Moq;
 using Xunit;
@@ -46,7 +48,7 @@ public async Task Sets_request_properties_correctly(string requestMethod, string
 
             var controllerResourceMappingMock = new Mock<IControllerResourceMapping>();
 
-            controllerResourceMappingMock.Setup(mapping => mapping.GetResourceTypeForController(It.IsAny<string>())).Returns(typeof(Article));
+            controllerResourceMappingMock.Setup(mapping => mapping.GetResourceTypeForController(It.IsAny<Type>())).Returns(typeof(Article));
 
             var httpContext = new DefaultHttpContext();
             SetupRoutes(httpContext, requestMethod, requestPath);
@@ -98,7 +100,13 @@ private static void SetupRoutes(HttpContext httpContext, string requestMethod, s
             }
 
             httpContext.Features.Set<IRouteValuesFeature>(feature);
-            httpContext.SetEndpoint(new Endpoint(null, new EndpointMetadataCollection(), null));
+
+            var controllerActionDescriptor = new ControllerActionDescriptor
+            {
+                ControllerTypeInfo = (TypeInfo)typeof(object)
+            };
+
+            httpContext.SetEndpoint(new Endpoint(null, new EndpointMetadataCollection(controllerActionDescriptor), null));
         }
     }
 }