diff --git a/lib/HotModuleReplacement.runtime.js b/lib/HotModuleReplacement.runtime.js
index 5756623e629..3082fcbb055 100644
--- a/lib/HotModuleReplacement.runtime.js
+++ b/lib/HotModuleReplacement.runtime.js
@@ -3,6 +3,12 @@
 	Author Tobias Koppers @sokra
 */
 /*global $hash$ $requestTimeout$ installedModules $require$ hotDownloadManifest hotDownloadUpdateChunk hotDisposeChunk modules */
+
+var $hash$ = undefined;
+var $requestTimeout$ = undefined;
+var installedModules = undefined;
+var $require$ = undefined;
+
 module.exports = function() {
 	var hotApplyOnUpdate = true;
 	// eslint-disable-next-line no-unused-vars
diff --git a/lib/node/NodeMainTemplate.runtime.js b/lib/node/NodeMainTemplate.runtime.js
index d34388bf76f..2f83631f80c 100644
--- a/lib/node/NodeMainTemplate.runtime.js
+++ b/lib/node/NodeMainTemplate.runtime.js
@@ -3,6 +3,11 @@
 	Author Tobias Koppers @sokra
 */
 /*global installedChunks $hotChunkFilename$ hotAddUpdateChunk $hotMainFilename$ */
+
+var $hotChunkFilename$ = undefined;
+var hotAddUpdateChunk = undefined;
+var installedChunks = undefined;
+
 module.exports = function() {
 	// eslint-disable-next-line no-unused-vars
 	function hotDownloadUpdateChunk(chunkId) {
diff --git a/lib/node/NodeMainTemplateAsync.runtime.js b/lib/node/NodeMainTemplateAsync.runtime.js
index 35eb47b665e..560a3cf597f 100644
--- a/lib/node/NodeMainTemplateAsync.runtime.js
+++ b/lib/node/NodeMainTemplateAsync.runtime.js
@@ -3,6 +3,13 @@
 	Author Tobias Koppers @sokra
 */
 /*global installedChunks $hotChunkFilename$ $require$ hotAddUpdateChunk $hotMainFilename$ */
+
+var $hotChunkFilename$ = undefined;
+var $require$ = undefined;
+var hotAddUpdateChunk = undefined;
+var $hotMainFilename$ = undefined;
+var installedChunks = undefined;
+
 module.exports = function() {
 	// eslint-disable-next-line no-unused-vars
 	function hotDownloadUpdateChunk(chunkId) {
diff --git a/lib/web/JsonpMainTemplate.runtime.js b/lib/web/JsonpMainTemplate.runtime.js
index 58dcf8312f1..c676dd8b7bc 100644
--- a/lib/web/JsonpMainTemplate.runtime.js
+++ b/lib/web/JsonpMainTemplate.runtime.js
@@ -3,6 +3,14 @@
 	Author Tobias Koppers @sokra
 */
 /*globals hotAddUpdateChunk parentHotUpdateCallback document XMLHttpRequest $require$ $hotChunkFilename$ $hotMainFilename$ $crossOriginLoading$ */
+
+var hotAddUpdateChunk = undefined;
+var parentHotUpdateCallback = undefined;
+var $require$ = undefined; 
+var $hotMainFilename$ = undefined;
+var $hotChunkFilename$ = undefined;
+var $crossOriginLoading$ = undefined;
+
 module.exports = function() {
 	// eslint-disable-next-line no-unused-vars
 	function webpackHotUpdateCallback(chunkId, moreModules) {
diff --git a/lib/webworker/WebWorkerMainTemplate.runtime.js b/lib/webworker/WebWorkerMainTemplate.runtime.js
index 8c63f7729e3..891edffd053 100644
--- a/lib/webworker/WebWorkerMainTemplate.runtime.js
+++ b/lib/webworker/WebWorkerMainTemplate.runtime.js
@@ -3,6 +3,15 @@
 	Author Tobias Koppers @sokra
 */
 /*globals installedChunks hotAddUpdateChunk parentHotUpdateCallback importScripts XMLHttpRequest $require$ $hotChunkFilename$ $hotMainFilename$ */
+
+var hotAddUpdateChunk = undefined;
+var parentHotUpdateCallback = undefined;
+var $require$ = undefined;
+var $hotChunkFilename$ = undefined;
+var $hotMainFilename$ = undefined;
+var installedChunks = undefined;
+var importScripts = undefined;
+
 module.exports = function() {
 	// eslint-disable-next-line no-unused-vars
 	function webpackHotUpdateCallback(chunkId, moreModules) {