diff --git a/packages/docusaurus-theme-classic/src/theme/Footer/index.js b/packages/docusaurus-theme-classic/src/theme/Footer/index.js
index 2a206a8bec..37e2d29ae1 100644
--- a/packages/docusaurus-theme-classic/src/theme/Footer/index.js
+++ b/packages/docusaurus-theme-classic/src/theme/Footer/index.js
@@ -33,7 +33,7 @@ function Footer() {
         {links && links.length > 0 && (
           <div className="row footer__links">
             {links.map((linkItem, i) => (
-              <div key={`linkItem-${i}`} className="col">
+              <div key={i} className="col footer__col">
                 {linkItem.title != null ? (
                   <h4 className="footer__title">{linkItem.title}</h4>
                 ) : null}