diff --git a/packages/eslint-config-react-app/index.js b/packages/eslint-config-react-app/index.js
index c7a619abd62..9b687663da9 100644
--- a/packages/eslint-config-react-app/index.js
+++ b/packages/eslint-config-react-app/index.js
@@ -225,13 +225,12 @@ module.exports = {
     'valid-typeof': 'warn',
     'no-restricted-properties': [
       'error',
-      // TODO: reenable once import() is no longer slow.
-      // https://github.com/facebookincubator/create-react-app/issues/2176
-      // {
-      //   object: 'require',
-      //   property: 'ensure',
-      //   message: 'Please use import() instead. More info: https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md#code-splitting',
-      // },
+      {
+        object: 'require',
+        property: 'ensure',
+        message:
+          'Please use import() instead. More info: https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md#code-splitting',
+      },
       {
         object: 'System',
         property: 'import',
diff --git a/packages/react-scripts/config/webpack.config.dev.js b/packages/react-scripts/config/webpack.config.dev.js
index 843ec0dd318..b509af97054 100644
--- a/packages/react-scripts/config/webpack.config.dev.js
+++ b/packages/react-scripts/config/webpack.config.dev.js
@@ -117,9 +117,8 @@ module.exports = {
   module: {
     strictExportPresence: true,
     rules: [
-      // TODO: Disable require.ensure as it's not a standard language feature.
-      // We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176.
-      // { parser: { requireEnsure: false } },
+      // Disable require.ensure as it's not a standard language feature.
+      { parser: { requireEnsure: false } },
 
       // First, run the linter.
       // It's important to do this before Babel processes the JS.
diff --git a/packages/react-scripts/config/webpack.config.prod.js b/packages/react-scripts/config/webpack.config.prod.js
index 2f37dbfe7f4..d3673a723b5 100644
--- a/packages/react-scripts/config/webpack.config.prod.js
+++ b/packages/react-scripts/config/webpack.config.prod.js
@@ -124,9 +124,8 @@ module.exports = {
   module: {
     strictExportPresence: true,
     rules: [
-      // TODO: Disable require.ensure as it's not a standard language feature.
-      // We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176.
-      // { parser: { requireEnsure: false } },
+      // Disable require.ensure as it's not a standard language feature.
+      { parser: { requireEnsure: false } },
 
       // First, run the linter.
       // It's important to do this before Babel processes the JS.