diff --git a/activesupport/lib/active_support/xml_mini/libxml.rb b/activesupport/lib/active_support/xml_mini/libxml.rb
index 231b2a0d0b..9cf187302f 100644
--- a/activesupport/lib/active_support/xml_mini/libxml.rb
+++ b/activesupport/lib/active_support/xml_mini/libxml.rb
@@ -1,5 +1,6 @@
 require 'libxml'
 require 'active_support/core_ext/object/returning'
+require 'active_support/core_ext/object/blank'
 
 # = XmlMini LibXML implementation
 module ActiveSupport