diff --git a/stubs/beautifulsoup4/bs4/__init__.pyi b/stubs/beautifulsoup4/bs4/__init__.pyi
index 4c6b894c0..c67e09e1e 100644
--- a/stubs/beautifulsoup4/bs4/__init__.pyi
+++ b/stubs/beautifulsoup4/bs4/__init__.pyi
@@ -32,7 +32,7 @@ class BeautifulSoup(Tag):
     element_classes: Any
     builder: TreeBuilder
     is_xml: bool
-    known_xml: bool
+    known_xml: bool | None
     parse_only: SoupStrainer | None
     markup: str
     def __init__(
diff --git a/stubs/beautifulsoup4/bs4/element.pyi b/stubs/beautifulsoup4/bs4/element.pyi
index 18f91d38e..8fc9681b7 100644
--- a/stubs/beautifulsoup4/bs4/element.pyi
+++ b/stubs/beautifulsoup4/bs4/element.pyi
@@ -299,7 +299,11 @@ class Tag(PageElement):
         errors: str = "xmlcharrefreplace",
     ) -> bytes: ...
     def decode(
-        self, indent_level: int | None = None, eventual_encoding: str = "utf-8", formatter: str | Formatter = "minimal"
+        self,
+        indent_level: int | None = None,
+        eventual_encoding: str = "utf-8",
+        formatter: str | Formatter = "minimal",
+        iterator: Iterator[PageElement] | None = None,
     ) -> str: ...
     @overload
     def prettify(self, encoding: str, formatter: str | Formatter = "minimal") -> bytes: ...