diff --git a/lib/oneboxer.rb b/lib/oneboxer.rb
index 5c5c99f89f4..5a2b656525a 100644
--- a/lib/oneboxer.rb
+++ b/lib/oneboxer.rb
@@ -127,7 +127,7 @@ module Oneboxer
   private
 
     def self.preview_key(user_id)
-      "PREVIEWING_ONEBOX_#{user_id}"
+      "onebox:preview:#{user_id}"
     end
 
     def self.blank_onebox