diff --git a/activerecord/lib/active_record/attribute_methods/before_type_cast.rb b/activerecord/lib/active_record/attribute_methods/before_type_cast.rb
index 9ee9a7815faa6d6b5b5b187f56920579604a6de6..fd61febd57202d460d32542ae8db943230d7b315 100644
--- a/activerecord/lib/active_record/attribute_methods/before_type_cast.rb
+++ b/activerecord/lib/active_record/attribute_methods/before_type_cast.rb
@@ -57,7 +57,7 @@ def read_attribute_before_type_cast(attr_name)
       #   task.attributes_before_type_cast
       #   # => {"id"=>nil, "title"=>nil, "is_done"=>true, "completed_on"=>"2012-10-21", "created_at"=>nil, "updated_at"=>nil}
       def attributes_before_type_cast
-        @attributes.each_with_object({}) { |(k, v), h| h[k] = v.value_before_type_cast }
+        @attributes.values_before_type_cast
       end
 
       private
diff --git a/activerecord/lib/active_record/attribute_set.rb b/activerecord/lib/active_record/attribute_set.rb
index ed2500a675b551e28861f302c6ab7f19d9315491..99fc9b6ac684f584c322fc1495d32e0da1a3a642 100644
--- a/activerecord/lib/active_record/attribute_set.rb
+++ b/activerecord/lib/active_record/attribute_set.rb
@@ -1,11 +1,15 @@
 module ActiveRecord
   class AttributeSet # :nodoc:
-    delegate :[], :[]=, :fetch, :include?, :keys, :each_with_object, to: :attributes
+    delegate :[], :[]=, :fetch, :include?, :keys, to: :attributes
 
     def initialize(attributes)
       @attributes = attributes
     end
 
+    def values_before_type_cast
+      attributes.each_with_object({}) { |(k, v), h| h[k] = v.value_before_type_cast }
+    end
+
     def to_hash
       attributes.each_with_object({}) { |(k, v), h| h[k] = v.value }
     end
diff --git a/activerecord/test/cases/attribute_set_test.rb b/activerecord/test/cases/attribute_set_test.rb
index 402a611efaf57baf4a798a0e49c52da7e68fee25..1c64f5f1d3af3ac73821e8c06aea077f89d79f6d 100644
--- a/activerecord/test/cases/attribute_set_test.rb
+++ b/activerecord/test/cases/attribute_set_test.rb
@@ -61,5 +61,12 @@ class AttributeSetTest < ActiveRecord::TestCase
       assert_equal({ foo: 1, bar: 2.2 }, attributes.to_hash)
       assert_equal({ foo: 1, bar: 2.2 }, attributes.to_h)
     end
+
+    test "values_before_type_cast" do
+      builder = AttributeSet::Builder.new(foo: Type::Integer.new, bar: Type::Integer.new)
+      attributes = builder.build_from_database(foo: '1.1', bar: '2.2')
+
+      assert_equal({ foo: '1.1', bar: '2.2' }, attributes.values_before_type_cast)
+    end
   end
 end