diff --git a/packages/docusaurus-theme-classic/src/theme/Tabs/index.js b/packages/docusaurus-theme-classic/src/theme/Tabs/index.js
index d1f9933759b2..a2b9d883fd97 100644
--- a/packages/docusaurus-theme-classic/src/theme/Tabs/index.js
+++ b/packages/docusaurus-theme-classic/src/theme/Tabs/index.js
@@ -31,7 +31,7 @@ function Tabs(props) {
         ))}
       </ul>
       <div className="margin-vert--md">
-        {children.filter(child => child.props.value === selectedValue)[0]}
+        {[...children].filter(child => child.props.value === selectedValue)[0]}
       </div>
     </div>
   );