diff --git a/lib/fast_jsonapi/object_serializer.rb b/lib/fast_jsonapi/object_serializer.rb
index e767135..d142a04 100644
--- a/lib/fast_jsonapi/object_serializer.rb
+++ b/lib/fast_jsonapi/object_serializer.rb
@@ -130,7 +130,7 @@ module FastJsonapi
         return @reflected_record_type if defined?(@reflected_record_type)
 
         @reflected_record_type ||= begin
-          if self.name.end_with?('Serializer')
+          if self.name && self.name.end_with?('Serializer')
             self.name.split('::').last.chomp('Serializer').underscore.to_sym
           end
         end
diff --git a/spec/lib/object_serializer_spec.rb b/spec/lib/object_serializer_spec.rb
index 74bb2f4..c86ce7c 100644
--- a/spec/lib/object_serializer_spec.rb
+++ b/spec/lib/object_serializer_spec.rb
@@ -314,13 +314,6 @@ describe FastJsonapi::ObjectSerializer do
       expect(BlahBlahSerializer.record_type).to be :blah_blah
     end
 
-    it 'shouldnt set default_type for a serializer that doesnt follow convention' do
-      class BlahBlahSerializerBuilder
-        include FastJsonapi::ObjectSerializer
-      end
-      expect(BlahBlahSerializerBuilder.record_type).to be_nil
-    end
-
     it 'should set default_type for a namespaced serializer' do
       module V1
         class BlahSerializer
@@ -329,6 +322,20 @@ describe FastJsonapi::ObjectSerializer do
       end
       expect(V1::BlahSerializer.record_type).to be :blah
     end
+
+    it 'shouldnt set default_type for a serializer that doesnt follow convention' do
+      class BlahBlahSerializerBuilder
+        include FastJsonapi::ObjectSerializer
+      end
+      expect(BlahBlahSerializerBuilder.record_type).to be_nil
+    end
+
+    it 'shouldnt set default_type for an anonymous serializer' do
+      serializer_class = Class.new do
+        include FastJsonapi::ObjectSerializer
+      end
+      expect(serializer_class.record_type).to be_nil
+    end
   end
 
   context 'when serializing included, serialize any links' do