diff --git a/stdlib/xml/dom/minidom.pyi b/stdlib/xml/dom/minidom.pyi
index 0c2c5a325..4d1d7a9d0 100644
--- a/stdlib/xml/dom/minidom.pyi
+++ b/stdlib/xml/dom/minidom.pyi
@@ -7,7 +7,7 @@ from xml.sax.xmlreader import XMLReader
 
 def parse(file: str | IO[Any], parser: XMLReader | None = ..., bufsize: int | None = ...): ...
 def parseString(string: str | bytes, parser: XMLReader | None = ...): ...
-def getDOMImplementation(features=...): ...
+def getDOMImplementation(features=...) -> DOMImplementation | None: ...
 
 class Node(xml.dom.Node):
     namespaceURI: str | None
@@ -246,8 +246,8 @@ class Notation(Identified, Childless, Node):
 
 class DOMImplementation(DOMImplementationLS):
     def hasFeature(self, feature, version) -> bool: ...
-    def createDocument(self, namespaceURI: str, qualifiedName: str, doctype): ...
-    def createDocumentType(self, qualifiedName: str, publicId, systemId): ...
+    def createDocument(self, namespaceURI: str | None, qualifiedName: str | None, doctype): ...
+    def createDocumentType(self, qualifiedName: str | None, publicId, systemId): ...
     def getInterface(self, feature): ...
 
 class ElementInfo: