diff --git a/src/octoprint/filemanager/storage.py b/src/octoprint/filemanager/storage.py
index f26a21ae..65a7c0bc 100644
--- a/src/octoprint/filemanager/storage.py
+++ b/src/octoprint/filemanager/storage.py
@@ -511,7 +511,7 @@ class LocalFileStorage(StorageInterface):
 		filepath = self.sanitize_path(filepath)
 		path = self.sanitize_path(path)
 
-		return filepath == path or filepath.startswith(path + "/")
+		return filepath == path or filepath.startswith(path + os.sep)
 
 	def file_exists(self, path):
 		path, name = self.sanitize(path)