diff --git a/ts/components/CallingButton.stories.tsx b/ts/components/CallingButton.stories.tsx
index 9e8dc99952..dfd1399a70 100644
--- a/ts/components/CallingButton.stories.tsx
+++ b/ts/components/CallingButton.stories.tsx
@@ -33,6 +33,7 @@ story.add('Kitchen Sink', () => {
     <>
       {Object.keys(CallingButtonType).map(buttonType => (
         <CallingButton
+          key={buttonType}
           {...createProps({ buttonType: buttonType as CallingButtonType })}
         />
       ))}