diff --git a/app/services/tax_rate_finder.rb b/app/services/tax_rate_finder.rb
index 1c979cf776..de16839044 100644
--- a/app/services/tax_rate_finder.rb
+++ b/app/services/tax_rate_finder.rb
@@ -77,6 +77,6 @@ class TaxRateFinder
     approximation = (included_tax / (amount - included_tax))
     return [] if approximation.infinite? || approximation.zero? || approximation.nan?
 
-    [Spree::TaxRate.order("ABS(amount - #{approximation})").first]
+    [Spree::TaxRate.order(Arel.sql("ABS(amount - #{approximation})")).first]
   end
 end