diff --git a/lib/galaxy/objectstore/__init__.py b/lib/galaxy/objectstore/__init__.py
index 748c74257c9..bf650139105 100644
--- a/lib/galaxy/objectstore/__init__.py
+++ b/lib/galaxy/objectstore/__init__.py
@@ -223,7 +223,7 @@ class DiskObjectStore(ObjectStore):
         if not os.path.exists(path):
             return self._construct_path(obj, base_dir=base_dir, dir_only=dir_only, extra_dir=extra_dir, extra_dir_at_root=extra_dir_at_root, alt_name=alt_name)
     
-    def _construct_path(self, obj, old_style=False, base_dir=None, dir_only=False, extra_dir=None, extra_dir_at_root=False, alt_name=None):
+    def _construct_path(self, obj, old_style=False, base_dir=None, dir_only=False, extra_dir=None, extra_dir_at_root=False, alt_name=None, **kwargs):
         """ Construct the expected absolute path for accessing the object
             identified by `obj`.id.