diff --git a/packages/react-core/src/demos/Banner.md b/packages/react-core/src/demos/Banner.md
index 08ecd08512a..48b9f11deaf 100644
--- a/packages/react-core/src/demos/Banner.md
+++ b/packages/react-core/src/demos/Banner.md
@@ -135,8 +135,8 @@ class BannerDemo extends React.Component {
               <PageSection>
                 <Gallery hasGutter>
                   {Array.from({ length: 30 }).map((_value, index) => (
-                    <GalleryItem key={i}>
-                      <Card key={i}>
+                    <GalleryItem key={index}>
+                      <Card key={index}>
                         <CardBody>This is a card</CardBody>
                       </Card>
                     </GalleryItem>