diff --git a/masque/library.py b/masque/library.py index c662b3a..3ed4f0b 100644 --- a/masque/library.py +++ b/masque/library.py @@ -609,7 +609,7 @@ class ILibrary(ILibraryView, MutableMapping[str, 'Pattern'], metaclass=ABCMeta): return {} if mutate_other: - if isinstance(Library, other): + if isinstance(other, Library): temp = other else: temp = Library(dict(other))