diff --git a/pyrebase/pyrebase.py b/pyrebase/pyrebase.py
index bc1fc3e..c5bb73b 100644
--- a/pyrebase/pyrebase.py
+++ b/pyrebase/pyrebase.py
@@ -426,7 +426,7 @@ def download(self, filename, token=None):
                     for chunk in r:
                         f.write(chunk)
 
-    def get_url(self, token):
+    def get_url(self, token=None):
         path = self.path
         self.path = None
         if path.startswith('/'):