diff --git a/app/models/pricelist.rb b/app/models/pricelist.rb
index 1287be9d1..cc7b898ea 100644
--- a/app/models/pricelist.rb
+++ b/app/models/pricelist.rb
@@ -1,7 +1,12 @@
 class Pricelist < ActiveRecord::Base
   include Versions # version/pricelist_version.rb
 
-  scope :valid, -> { where("valid_from <= ? AND valid_to >= ? OR valid_to IS NULL", Time.zone.now.end_of_day, Time.zone.now.beginning_of_day) }
+  scope :valid, lambda {
+    where(
+      "valid_from <= ? AND valid_to >= ? OR valid_to IS NULL",
+      Time.zone.now.end_of_day, Time.zone.now.beginning_of_day
+    )
+  }
 
   monetize :price_cents