diff --git a/src/python/jw/pkg/lib/Types.py b/src/python/jw/pkg/lib/Types.py
index bfae01ad..344da9ca 100644
--- a/src/python/jw/pkg/lib/Types.py
+++ b/src/python/jw/pkg/lib/Types.py
@@ -102,7 +102,10 @@ class LoadTypes(Types[T]):  # export
                         self._debug(f'o "{name}" has wrong name')
                         continue
                     if inspect.isabstract(c):
-                        self._debug(f'o "{name}" is abstract: {c.__abstractmethods__}')
+                        abstract: frozenset[str] = getattr(
+                            c, '__abstractmethods__', frozenset()
+                        )
+                        self._debug(f'o "{name}" is abstract: {abstract}')
                         continue
                     if self.__type_filter:
                         for tp in self.__type_filter: