diff --git a/app/models/spree/product.rb b/app/models/spree/product.rb
index 2b43358ab1..0f8eeab61c 100755
--- a/app/models/spree/product.rb
+++ b/app/models/spree/product.rb
@@ -95,6 +95,7 @@ module Spree
     validates :tax_category_id, presence: true, if: "Spree::Config.products_require_tax_category"
 
     validates :variant_unit, presence: true
+    validates :unit_value, presence: true
     validates :variant_unit_scale,
               presence: { if: ->(p) { %w(weight volume).include? p.variant_unit } }
     validates :variant_unit_name,