diff --git a/lib/omt.ejs b/lib/omt.ejs
index fabca564..93c5a484 100644
--- a/lib/omt.ejs
+++ b/lib/omt.ejs
@@ -16,8 +16,7 @@ if (!self.<%- amdFunctionName %>) {
   let registry = {};
 
   const singleRequire = (uri, parentUri) => {
-    let origURI = uri;
-    uri = new URL(uri + ".js", parentUri).href;
+    uri = uri.startsWith(location.origin) ? uri : new URL(uri + ".js", parentUri).href;
     return registry[uri] || (
       <% if (useEval) { %>
         fetch(uri)