diff --git a/packages/gatsby-plugin-manifest/src/gatsby-ssr.js b/packages/gatsby-plugin-manifest/src/gatsby-ssr.js
index dec03264c10dc..f981b317ac36a 100644
--- a/packages/gatsby-plugin-manifest/src/gatsby-ssr.js
+++ b/packages/gatsby-plugin-manifest/src/gatsby-ssr.js
@@ -5,7 +5,11 @@ exports.onRenderBody = ({ setHeadComponents }, pluginOptions) => {
   // If icons were generated, also add a favicon link.
   if (pluginOptions.icon) {
     setHeadComponents([
-      <link rel="shortcut icon" href="/icons/icon-48x48.png" />,
+      <link
+        key={`gatsby-plugin-manifest-icon-link`}
+        rel="shortcut icon"
+        href="/icons/icon-48x48.png"
+      />,
     ])
   }
   setHeadComponents([