diff --git a/JSONAPI.Tests/Json/JsonApiMediaFormaterTests.cs b/JSONAPI.Tests/Json/JsonApiMediaFormaterTests.cs
index fe2c7e96..94490d44 100644
--- a/JSONAPI.Tests/Json/JsonApiMediaFormaterTests.cs
+++ b/JSONAPI.Tests/Json/JsonApiMediaFormaterTests.cs
@@ -73,6 +73,11 @@ public void SetupModels()
 
         }
 
+        private enum TestEnum
+        {
+            
+        }
+
         [TestMethod]
         public void CanWritePrimitiveTest()
         {
@@ -89,6 +94,8 @@ public void CanWritePrimitiveTest()
             Assert.IsTrue(formatter.CanWriteTypeAsPrimitive(typeof(DateTime?)), "CanWriteTypeAsPrimitive returned wrong answer for nullable DateTime!");
             Assert.IsTrue(formatter.CanWriteTypeAsPrimitive(typeof(DateTimeOffset?)), "CanWriteTypeAsPrimitive returned wrong answer for nullable DateTimeOffset!");
             Assert.IsTrue(formatter.CanWriteTypeAsPrimitive(typeof(Guid?)), "CanWriteTypeAsPrimitive returned wrong answer for nullable Guid!");
+            Assert.IsTrue(formatter.CanWriteTypeAsPrimitive(typeof(TestEnum)), "CanWriteTypeAsPrimitive returned wrong answer for enum!");
+            Assert.IsTrue(formatter.CanWriteTypeAsPrimitive(typeof(TestEnum?)), "CanWriteTypeAsPrimitive returned wrong answer for nullable enum!");
             Assert.IsFalse(formatter.CanWriteTypeAsPrimitive(typeof(Object)), "CanWriteTypeAsPrimitive returned wrong answer for Object!");
         }
 
diff --git a/JSONAPI/Json/JsonApiFormatter.cs b/JSONAPI/Json/JsonApiFormatter.cs
index 774c7c41..5bc1fa79 100644
--- a/JSONAPI/Json/JsonApiFormatter.cs
+++ b/JSONAPI/Json/JsonApiFormatter.cs
@@ -55,6 +55,10 @@ public bool CanWriteTypeAsPrimitive(Type objectType)
                 || typeof(System.DateTime?).IsAssignableFrom(objectType)
                 || typeof(System.DateTimeOffset?).IsAssignableFrom(objectType)
                 || typeof(String).IsAssignableFrom(objectType)
+                || objectType.IsEnum
+                || (objectType.IsGenericType &&
+                    objectType.GetGenericTypeDefinition() == typeof(Nullable<>) &&
+                    objectType.GetGenericArguments()[0].IsEnum)
                 )
                 return true;
             else return false;