diff --git a/lib/json_builder/compiler.rb b/lib/json_builder/compiler.rb
index 13461c2..26e4251 100644
--- a/lib/json_builder/compiler.rb
+++ b/lib/json_builder/compiler.rb
@@ -172,7 +172,7 @@ def copy_instance_variables_from(object, exclude = []) #:nodoc:
     #
     # Returns an Array of Symbols.
     def ignore_scope_methods
-      [:id]
+      [:id, :label]
     end
   end
 end
diff --git a/lib/json_builder/template.rb b/lib/json_builder/template.rb
index 251ffa6..2846503 100644
--- a/lib/json_builder/template.rb
+++ b/lib/json_builder/template.rb
@@ -31,7 +31,7 @@ def compile(template) %{
 end
 
 # Rails 3.X and 4.X Template
-if defined?(Rails) && Rails.version.starts_with?('3', '4')
+if defined?(Rails) && Rails.version.to_s.starts_with?('3', '4')
   module ActionView
     module Template::Handlers
       class JSONBuilder