diff --git a/lib/active_model/serializer/array_serializer.rb b/lib/active_model/serializer/array_serializer.rb
index b36fd971..c234bbb4 100644
--- a/lib/active_model/serializer/array_serializer.rb
+++ b/lib/active_model/serializer/array_serializer.rb
@@ -3,7 +3,7 @@ class ActiveModel::Serializer
   class ArraySerializer < CollectionSerializer
     class << self
       extend ActiveModelSerializers::Deprecate
-      deprecate :new, 'ActiveModel::CollectionSerializer.'
+      deprecate :new, 'ActiveModel::Serializer::CollectionSerializer.'
     end
   end
 end