diff --git a/coffea/nanoevents/schemas/base.py b/coffea/nanoevents/schemas/base.py
index 93f9e128d..81e665378 100644
--- a/coffea/nanoevents/schemas/base.py
+++ b/coffea/nanoevents/schemas/base.py
@@ -91,8 +91,6 @@ class BaseSchema:
     form is accessible as a direct descendant.
     """
 
-    behavior = {}
-
     def __init__(self, base_form):
         params = dict(base_form.get("parameters", {}))
         params["__record__"] = "NanoEvents"