diff --git a/src/Microsoft.AspNet.Mvc.Core/DefaultControllerFactory.cs b/src/Microsoft.AspNet.Mvc.Core/DefaultControllerFactory.cs
index e7ae87b916..e634dcbfe6 100644
--- a/src/Microsoft.AspNet.Mvc.Core/DefaultControllerFactory.cs
+++ b/src/Microsoft.AspNet.Mvc.Core/DefaultControllerFactory.cs
@@ -30,7 +30,7 @@ namespace Microsoft.AspNet.Mvc
                 throw new ArgumentException(
                     Resources.FormatActionDescriptorMustBeBasedOnControllerAction(
                         typeof(ControllerActionDescriptor)),
-                    "actionContext");
+                    nameof(actionContext));
             }
 
             var controller = _typeActivator.CreateInstance(