diff --git a/lib/webpack.js b/lib/webpack.js
index ffd0cd5695d..4a064b02a6f 100644
--- a/lib/webpack.js
+++ b/lib/webpack.js
@@ -60,12 +60,12 @@ webpack.WebpackOptionsValidationError = WebpackOptionsValidationError;
 
 function exportPlugins(obj, mappings) {
 	Object.keys(mappings).forEach(name => {
-		Object.defineProperty(exports, name, {
+		Object.defineProperty(obj, name, {
 			configurable: false,
 			enumerable: true,
 			get: mappings[name]
 		});
-	})
+	});
 }
 
 exportPlugins(exports, {