diff --git a/gogio/jsbuild.go b/gogio/jsbuild.go
index b63502c..c476b16 100644
--- a/gogio/jsbuild.go
+++ b/gogio/jsbuild.go
@@ -174,7 +174,7 @@ const (
 </html>`
 	// jsSetGo sets the `window.go` variable.
 	jsSetGo = `(() => {
-    window.go = {argv: [], env: {}, importObject: {go: {}}};
+    window.go = {argv: [], env: {}, importObject: {go: {}, gojs: {}}};
 	const argv = new URLSearchParams(location.search).get("argv");
 	if (argv) {
 		window.go["argv"] = argv.split(" ");