diff --git a/lib/spree/core/product_duplicator.rb b/lib/spree/core/product_duplicator.rb
index 409d457af5..5d94a5fe77 100644
--- a/lib/spree/core/product_duplicator.rb
+++ b/lib/spree/core/product_duplicator.rb
@@ -24,6 +24,7 @@ module Spree
           new_product.created_at = nil
           new_product.deleted_at = nil
           new_product.updated_at = nil
+          new_product.unit_value = true
           new_product.product_properties = reset_properties
           new_product.image = duplicate_image(product.image) if product.image
           new_product.variants = duplicate_variants