diff --git a/packages/scripts/config/webpack.config.js b/packages/scripts/config/webpack.config.js
index 0a6b756c30dc33..4ee428b41ead25 100644
--- a/packages/scripts/config/webpack.config.js
+++ b/packages/scripts/config/webpack.config.js
@@ -121,6 +121,9 @@ const config = {
 					compress: {
 						passes: 2,
 					},
+					mangle: {
+						reserved: [ '__', '_n', '_nx', '_x' ],
+					},
 				},
 				extractComments: false,
 			} ),
diff --git a/webpack.config.js b/webpack.config.js
index de8be6fab09e98..4a553dab1af78e 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -81,6 +81,9 @@ module.exports = {
 					compress: {
 						passes: 2,
 					},
+					mangle: {
+						reserved: [ '__', '_n', '_nx', '_x' ],
+					},
 				},
 				extractComments: false,
 			} ),