diff --git a/hassio/api/__init__.py b/hassio/api/__init__.py
index 44a656a69..5bc9ddec0 100644
--- a/hassio/api/__init__.py
+++ b/hassio/api/__init__.py
@@ -102,7 +102,7 @@ class RestAPI(object):
         panel_dir = Path(__file__).parents[1].joinpath('panel')
 
         self.webapp.router.register_resource(
-            web.StaticResource('/panel', str(panel_dir)))
+            web.StaticResource('/panel', panel_dir))
 
     async def start(self):
         """Run rest api webserver."""