diff --git a/packages/next/build/webpack/loaders/next-babel-loader.js b/packages/next/build/webpack/loaders/next-babel-loader.js
index <HASH>..<HASH> 100644
--- a/packages/next/build/webpack/loaders/next-babel-loader.js
+++ b/packages/next/build/webpack/loaders/next-babel-loader.js
@@ -4,7 +4,7 @@ import hash from 'string-hash'
 
 // increment 'e' to invalidate cache
 // eslint-disable-next-line no-useless-concat
-const cacheKey = 'babel-cache-' + 'f' + '-'
+const cacheKey = 'babel-cache-' + 'g' + '-'
 const nextBabelPreset = require('../../babel/preset')
 
 const getModernOptions = (babelOptions = {}) => {
Bump Babel Cache Key (#<I>)