diff --git a/src/lvmopstools/actor.py b/src/lvmopstools/actor.py
index 52b4b84..7ab52c0 100644
--- a/src/lvmopstools/actor.py
+++ b/src/lvmopstools/actor.py
@@ -79,7 +79,18 @@ def wrapper(added_enum):
             joined[item.name] = item.value
         for item in added_enum:
             joined[item.name] = item.value
-        return enum.Enum(added_enum.__name__, joined)
+
+        new_enum_class = enum.Enum(added_enum.__name__, joined)
+
+        # Add methods from the inherited class.
+        for attr in inherited_enum.__dict__:
+            if attr.startswith("__"):
+                continue
+            if hasattr(new_enum_class, attr):
+                continue
+            setattr(new_enum_class, attr, getattr(inherited_enum, attr))
+
+        return new_enum_class
 
     return wrapper
 
diff --git a/tests/test_actor.py b/tests/test_actor.py
index 281b8d8..7652ffa 100644
--- a/tests/test_actor.py
+++ b/tests/test_actor.py
@@ -37,6 +37,8 @@ class ExtraErrorCodes(enum.Enum):
     assert hasattr(ExtraErrorCodes, "SOME_FAILURE_MODE")
     assert hasattr(ExtraErrorCodes, "UNKNOWN")
 
+    assert hasattr(ExtraErrorCodes, "get_error_code")
+
 
 def test_verify_error_codes_fails():
     with pytest.raises(ValueError):