diff --git a/docs/main.js b/docs/main.js
index 1107757b..faf392e5 100644
--- a/docs/main.js
+++ b/docs/main.js
@@ -165,5 +165,5 @@ window.onpopstate = function (event) {
 
 function tohomeurl() {
     var hostname = window.location.hostname;
-    window.open(window.location.protocol + hostname.substring(5));
+    window.open(window.location.protocol + '//' + hostname.substring(5));
 }
\ No newline at end of file