diff --git a/packages/next/src/shared/lib/head.tsx b/packages/next/src/shared/lib/head.tsx
index 978dfd8401f13..b116b2f32851d 100644
--- a/packages/next/src/shared/lib/head.tsx
+++ b/packages/next/src/shared/lib/head.tsx
@@ -12,9 +12,11 @@ type WithInAmpMode = {
 }
 
 export function defaultHead(inAmpMode = false): JSX.Element[] {
-  const head = [<meta charSet="utf-8" />]
+  const head = [<meta charSet="utf-8" key="charset" />]
   if (!inAmpMode) {
-    head.push(<meta name="viewport" content="width=device-width" />)
+    head.push(
+      <meta name="viewport" content="width=device-width" key="viewport" />
+    )
   }
   return head
 }