diff --git a/lib/z-worker-inline-template.js b/lib/z-worker-inline-template.js
index 6558a029..c8684138 100644
--- a/lib/z-worker-inline-template.js
+++ b/lib/z-worker-inline-template.js
@@ -35,7 +35,7 @@ export {
 function configureWebWorker(configure, options = {}) {
 	// eslint-disable-next-line quotes
 	const code = `__workerCode__`;
-	const uri = options.useDataURI ?
+	const uri = () => options.useDataURI ?
 		`data:text/javascript,${encodeURIComponent(code)}` :
 		URL.createObjectURL(new Blob([code], { type: "text/javascript" }));
 	configure({ workerScripts: { inflate: [uri], deflate: [uri] } });