diff --git a/packages/babel-preset-app/src/index.js b/packages/babel-preset-app/src/index.js
index 76df87fd56bf..0d9f77b394e9 100644
--- a/packages/babel-preset-app/src/index.js
+++ b/packages/babel-preset-app/src/index.js
@@ -137,7 +137,8 @@ module.exports = (api, options = {}) => {
         // but webpack 4 doesn't support the syntax when target supports and babel transpilation is skipped
         // https://github.com/webpack/webpack/issues/9708
         '@babel/plugin-proposal-class-properties',
-        '@babel/plugin-proposal-private-methods'
+        '@babel/plugin-proposal-private-methods',
+        '@babel/plugin-proposal-private-property-in-object'
       ],
       shippedProposals,
       forceAllTransforms
@@ -156,7 +157,8 @@ module.exports = (api, options = {}) => {
     }],
     // class-properties and private-methods need same loose value
     [require('@babel/plugin-proposal-class-properties'), { loose: true }],
-    [require('@babel/plugin-proposal-private-methods'), { loose: true }]
+    [require('@babel/plugin-proposal-private-methods'), { loose: true }],
+    [require('@babel/plugin-proposal-private-property-in-object'), { loose: true }]
   )
 
   // Transform runtime, but only for helpers