diff --git a/lib/active_resource/collection.rb b/lib/active_resource/collection.rb
index 7ee432b7ac..dcb4048a56 100644
--- a/lib/active_resource/collection.rb
+++ b/lib/active_resource/collection.rb
@@ -77,7 +77,7 @@ def first_or_create(attributes = {})
     end
 
     def first_or_initialize(attributes = {})
-      first || resource_class.build(original_params.update(attributes))
+      first || resource_class.new(original_params.update(attributes))
     rescue NoMethodError
       raise "Cannot build resource from resource type: #{resource_class.inspect}"
     end