diff --git a/src/collector/index.js b/src/collector/index.js
index b8cfaf9..852428f 100644
--- a/src/collector/index.js
+++ b/src/collector/index.js
@@ -50,7 +50,7 @@ export default class Collector {
 
         // TODO: customize it.
         // XXX: replace with normal resolver and path-to-id converter.
-        const id = pathToId(path.replace(/\/source\.js$/, ''));
+        const id = pathToId(path.replace(/source\.js$/, ''));
         module = new Module(id, path);
 
         const scope = this._global.extend(module);