diff --git a/lib/acts-as-taggable-on.rb b/lib/acts-as-taggable-on.rb
index 9903319f9..bab989125 100644
--- a/lib/acts-as-taggable-on.rb
+++ b/lib/acts-as-taggable-on.rb
@@ -1,4 +1,5 @@
 require "active_record"
+require "active_record/version"
 require "action_view"
 
 $LOAD_PATH.unshift(File.dirname(__FILE__))