diff --git a/custom_components/zha_toolkit/scan_device.py b/custom_components/zha_toolkit/scan_device.py
index 12f2fb6..3ced0e0 100644
--- a/custom_components/zha_toolkit/scan_device.py
+++ b/custom_components/zha_toolkit/scan_device.py
@@ -2,7 +2,6 @@
 
 import asyncio
 import logging
-import re
 
 from zigpy import types as t
 from zigpy.exceptions import ControllerException, DeliveryError
@@ -14,6 +13,9 @@
 LOGGER = logging.getLogger(__name__)
 
 
+ACCESS_CONTROL_MAP = {0x01: "READ", 0x02: "WRITE", 0x04: "REPORT"}
+
+
 @u.retryable(
     (
         DeliveryError,
@@ -231,13 +233,16 @@ async def discover_attributes_extended(cluster, manufacturer=None, tries=3):
                 ]
             else:
                 attr_type = attr_type_hex
-            try:
-                access = re.sub(
-                    "^.*\\.",
-                    "",
-                    str(foundation.AttributeAccessControl(access_acl)),
+
+            if access_acl != 0:
+                access = "|".join(
+                    [
+                        s
+                        for x, s in ACCESS_CONTROL_MAP.items()
+                        if x & access_acl != 0
+                    ]
                 )
-            except ValueError:
+            else:
                 access = "undefined"
 
             result[attr_id] = {