Facebook has made a small change to its performance advertising system, intended to help any advertiser get access to more target users for less money. The company already lets you select advertising demographics based on factors like age, sex and city. Now, it’s giving you the option to slightly expand the scope of the ages you target, giving you access to more people near your desired target, who may cost less to reach.

Here’s the text Facebook about the new feature, currently appearing in advertisers’ administrative panels:

Broaden your age targeting automatically!

You can now get more clicks and impressions outside your target age range, and we’ll make sure you get a good deal! Previously, if you chose to target people aged 24 – 35, your ad would only be shown to people aged precisely 24 – 35. But isn’t someone who’s 36 and is interested in your ad just as valuable as someone who is 35? After extensive testing, we found that by allowing the system to increase delivery of your ads slightly outside your target age range, you can receive additional discounted impressions and clicks that are nearly as valuable as the impressions and clicks within your target age. As a result, you see more value from your ads on Facebook and a better return on your investment. You can update your existing campaigns to broad age match today: Go to the Settings page and click on the “Update” button at the bottom of the page.

You can turn the feature on by scrolling to the bottom of your admin panel. You’ll see a new option asking if you want to opt in to the new targeting parameters. You’ll then be shown a box telling you that your account is updating, and you’ll be given the option to include broad targeting for all existing ads.