# What happens if addon inventory is zero?

**If the addon product inventory reaches zero, it will not display with the main product, as Shopify automatically marks it as Sold Out.**

**To show Sold Out addon products on the storefront, enable the setting: *****Display Sold-Out Product*****.**

<figure><img src="/files/807xwMhXyRh6e5BwACL9" alt=""><figcaption></figcaption></figure>


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