diff --git a/modules/PathUtils.js b/modules/PathUtils.js
index 7d586b69f..9ac3ec2e1 100644
--- a/modules/PathUtils.js
+++ b/modules/PathUtils.js
@@ -5,7 +5,7 @@ export const stripLeadingSlash = (path) =>
   path.charAt(0) === '/' ? path.substr(1) : path
 
 export const hasBasename = (path, prefix) => 
-  path.toLowerCase().startsWith(prefix.toLowerCase()) && "/?#".indexOf(path.charAt(prefix.length)) !== -1
+  path.toLowerCase().lastIndexOf(prefix.toLowerCase(), 0) === 0 && "/?#".indexOf(path.charAt(prefix.length)) !== -1
 
 export const stripBasename = (path, prefix) =>
   hasBasename(path, prefix) ? path.substr(prefix.length) : path