diff --git a/packages/react-error-overlay/src/components/CodeBlock.js b/packages/react-error-overlay/src/components/CodeBlock.js
index 3165bb3b028..f2bda36342b 100644
--- a/packages/react-error-overlay/src/components/CodeBlock.js
+++ b/packages/react-error-overlay/src/components/CodeBlock.js
@@ -10,6 +10,7 @@ import React from 'react';
 import { redTransparent, yellowTransparent } from '../styles';
 
 const _preStyle = {
+  position: 'relative',
   display: 'block',
   padding: '0.5em',
   marginTop: '0.5em',