diff --git a/easywebdav/client.py b/easywebdav/client.py
index 4003198..a8fb219 100644
--- a/easywebdav/client.py
+++ b/easywebdav/client.py
@@ -12,6 +12,7 @@
 else:
     from http.client import responses as HTTP_CODES
     from urllib.parse import urlparse
+    basestring = str
 
 DOWNLOAD_CHUNK_SIZE_BYTES = 1 * 1024 * 1024