diff --git a/stubs/PyYAML/yaml/constructor.pyi b/stubs/PyYAML/yaml/constructor.pyi
index b024ba42e95c..cfbe7828b019 100644
--- a/stubs/PyYAML/yaml/constructor.pyi
+++ b/stubs/PyYAML/yaml/constructor.pyi
@@ -27,11 +27,11 @@ class BaseConstructor:
     def get_data(self): ...
     def get_single_data(self) -> Any: ...
     def construct_document(self, node): ...
-    def construct_object(self, node, deep=False): ...
+    def construct_object(self, node, deep: bool = False): ...
     def construct_scalar(self, node: ScalarNode) -> str: ...
     def construct_sequence(self, node: SequenceNode, deep: bool = False) -> list[Any]: ...
     def construct_mapping(self, node: MappingNode, deep: bool = False) -> dict[Hashable, Any]: ...
-    def construct_pairs(self, node, deep=False): ...
+    def construct_pairs(self, node, deep: bool = False): ...
     @classmethod
     # Use typevars so we can have covariant behaviour in the parameter types
     def add_constructor(cls, tag: str, constructor: Callable[[_L, _N], Any]) -> None: ...