diff --git a/src/python/jw/pkg/lib/Types.py b/src/python/jw/pkg/lib/Types.py
index 56623537..341a17c1 100644
--- a/src/python/jw/pkg/lib/Types.py
+++ b/src/python/jw/pkg/lib/Types.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from typing import TypeVar, Generic
-import abc, re, sys
+import abc, re, sys, os
 from collections.abc import Iterable, Iterator
 
 from .log import *
@@ -34,7 +34,13 @@ class Types(abc.ABC, Iterable[T], Generic[T]): # export
 
 class LoadTypes(Types): # export
 
-    def __init__(self, mod_names: list[str], type_name_filter: str=None, type_filter: list[T]=[], debug_level=OFF):
+    def __init__(self, mod_names: list[str], type_name_filter: str=None, type_filter: list[T]=[], debug_level=None):
+        if debug_level is None:
+            val = os.getenv('JW_LOG_LEVEL_LOAD_TYPES')
+            if val is not None:
+                debug_level = parse_log_level(val)
+            else:
+                debug_level = OFF
         self.__debug_level = debug_level
         self.__type_name_filter = type_name_filter
         self.__type_filter = type_filter