diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 3b8df4f2f101a788814770ab558cc18c54521ce5..eb4a16ecf5d170dd5a3318dc4727960bc341fdc9 100644
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -1058,7 +1058,7 @@ def method_missing(method_id, *arguments, &block)
             if match.finder?
               options = arguments.extract_options!
               relation = options.any? ? scoped(options) : scoped
-              relation.send :find_by_attributes, match, attribute_names, *arguments
+              relation.send :find_by_attributes, match, attribute_names, *arguments, &block
             elsif match.instantiator?
               scoped.send :find_or_instantiator_by_attributes, match, attribute_names, *arguments, &block
             end
diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb
index c6e8762b4a584e3a44448a96bcd7306975beef9c..422d89060bd43272ef3d7730c8f2a5bc574159a2 100644
--- a/activerecord/lib/active_record/relation/finder_methods.rb
+++ b/activerecord/lib/active_record/relation/finder_methods.rb
@@ -259,6 +259,7 @@ def find_by_attributes(match, attributes, *args)
       if match.bang? && result.blank?
         raise RecordNotFound, "Couldn't find #{@klass.name} with #{conditions.to_a.collect {|p| p.join(' = ')}.join(', ')}"
       else
+        yield(result) if block_given?
         result
       end
     end
diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb
index 5a95e68eb4bb0df9ae6ea7466c740329ff25939d..0aaa0342b1e0414b7ba257a87a32c751a185831b 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -391,6 +391,15 @@ def test_loading_with_one_association_with_non_preload
     assert_equal Post.find(1).last_comment, post.last_comment
   end
 
+  def test_dynamic_find_by_attributes_should_yield_found_object
+    david = authors(:david)
+    yielded_value = nil
+    Author.find_by_name(david.name) do |author|
+      yielded_value = author
+    end
+    assert_equal david, yielded_value
+  end
+
   def test_dynamic_find_by_attributes
     david = authors(:david)
     author = Author.preload(:taggings).find_by_id(david.id)