diff --git a/src/components/RelatedContent.js b/src/components/RelatedContent.js
index 639b32c3e..e95a36e0c 100644
--- a/src/components/RelatedContent.js
+++ b/src/components/RelatedContent.js
@@ -1,4 +1,5 @@
 import React, { useContext } from 'react';
+import PropTypes from 'prop-types';
 import { css } from '@emotion/core';
 import { graphql, useStaticQuery } from 'gatsby';
 import { Button, ExternalLink, Icon } from '@newrelic/gatsby-theme-newrelic';
@@ -67,4 +68,8 @@ const RelatedContent = ({ className }) => {
   );
 };
 
+RelatedContent.propTypes = {
+  className: PropTypes.string,
+};
+
 export default RelatedContent;