diff --git a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb
index 295a7bed878b630ba160639fe65c15eb0417aabd..14d04a6388a8442fb85b9e99a323d413abf58396 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb
@@ -33,6 +33,7 @@ def set_state(state)
 
     class NullTransaction #:nodoc:
       def initialize; end
+      def state; end
       def closed?; true; end
       def open?; false; end
       def joinable?; false; end
diff --git a/activerecord/test/cases/transactions_test.rb b/activerecord/test/cases/transactions_test.rb
index ec5bdfd7254ba67d57a6d328adba6014a3a2b14c..791b895d02fc78a22842b319d73af90f45dabd5c 100644
--- a/activerecord/test/cases/transactions_test.rb
+++ b/activerecord/test/cases/transactions_test.rb
@@ -58,6 +58,11 @@ def transaction_with_return
     end
   end
 
+  def test_add_to_null_transaction
+    topic = Topic.new
+    topic.add_to_transaction
+  end
+
   def test_successful_with_return
     committed = false