diff --git a/lib/active_model/serializer.rb b/lib/active_model/serializer.rb
index 88f96d10..beff728a 100644
--- a/lib/active_model/serializer.rb
+++ b/lib/active_model/serializer.rb
@@ -160,9 +160,9 @@ module ActiveModel
     def serialize_ids(association)
       associated_data = send(association.name)
       if associated_data.respond_to?(:to_ary)
-        associated_data.map { |elem| elem.send(association.embed_key) }
+        associated_data.map { |elem| elem.read_attribute_for_serialization(association.embed_key) }
       else
-        associated_data.send(association.embed_key) if associated_data
+        associated_data.read_attribute_for_serialization(association.embed_key) if associated_data
       end
     end
 
diff --git a/test/fixtures/poro.rb b/test/fixtures/poro.rb
index e9d41da3..a43954b5 100644
--- a/test/fixtures/poro.rb
+++ b/test/fixtures/poro.rb
@@ -4,11 +4,11 @@ class Model
   end
 
   def read_attribute_for_serialization(name)
-    @attributes[name]
-  end
-
-  def id
-    object_id
+    if name == :id || name == 'id'
+      object_id
+    else
+      @attributes[name]
+    end
   end
 end