diff --git a/app/models/spree/adjustment.rb b/app/models/spree/adjustment.rb
index 2494d372c9..4f3ab3da96 100644
--- a/app/models/spree/adjustment.rb
+++ b/app/models/spree/adjustment.rb
@@ -134,11 +134,15 @@ module Spree
     end
 
     def has_tax?
-      included_tax.positive?
+      tax_total.positive?
     end
 
     private
 
+    def tax_total
+      adjustments.tax.sum(:amount)
+    end
+
     def update_adjustable_adjustment_total
       Spree::ItemAdjustments.new(adjustable).update if adjustable
     end