diff --git a/core/app/models/spree/product.rb b/core/app/models/spree/product.rb
index 3a5b57dc954..fa563bfa926 100644
--- a/core/app/models/spree/product.rb
+++ b/core/app/models/spree/product.rb
@@ -180,8 +180,7 @@ def self.like_any(fields, values)
     private
       def recalculate_count_on_hand
         product_count_on_hand = has_variants? ?
-          variants.inject(0) { |acc, v| acc + v.count_on_hand } :
-          (master ? master.count_on_hand : 0)
+          variants.sum(:count_on_hand) : (master ? master.count_on_hand : 0)
         self.count_on_hand = product_count_on_hand
       end