diff --git a/lib/webworker/WebWorkerMainTemplatePlugin.js b/lib/webworker/WebWorkerMainTemplatePlugin.js
index 7bccb45f5..0cc84c60a 100644
--- a/lib/webworker/WebWorkerMainTemplatePlugin.js
+++ b/lib/webworker/WebWorkerMainTemplatePlugin.js
@@ -45,7 +45,7 @@ class WebWorkerMainTemplatePlugin {
 						"if(!installedChunks[chunkId]) {",
 						Template.indent([
 							"importScripts(" +
-								`__webpack_require__.p + ` +
+								"__webpack_require__.p + " +
 								mainTemplate.getAssetPath(JSON.stringify(chunkFilename), {
 									hash: `" + ${mainTemplate.renderCurrentHashCode(hash)} + "`,
 									hashWithLength: length =>