diff --git a/changelogs/fragments/207-trivial.yaml b/changelogs/fragments/207-trivial.yaml
new file mode 100644
index 0000000..c6d351b
--- /dev/null
+++ b/changelogs/fragments/207-trivial.yaml
@@ -0,0 +1,3 @@
+---
+trivial:
+  - Update simple class definition. (https://github.com/ansible-collections/ansible.utils/pull/207)
diff --git a/plugins/filter/hwaddr.py b/plugins/filter/hwaddr.py
index f9abb2e..ded9fa7 100644
--- a/plugins/filter/hwaddr.py
+++ b/plugins/filter/hwaddr.py
@@ -39,9 +39,8 @@ except ImportError:
 else:
 
     class mac_linux(netaddr.mac_unix):
-        pass
+        word_fmt = "%.2x"
 
-    mac_linux.word_fmt = "%.2x"
 
 DOCUMENTATION = """
     name: hwaddr