diff --git a/Lib/xml/dom/minidom.py b/Lib/xml/dom/minidom.py
index 33ad736ea81..967320f5aa5 100644
--- a/Lib/xml/dom/minidom.py
+++ b/Lib/xml/dom/minidom.py
@@ -459,7 +459,6 @@ class NamedNodeMap:
         node.unlink()
         del self._attrs[node.name]
         del self._attrsNS[(node.namespaceURI, node.localName)]
-        self.length = len(self._attrs)
 
 AttributeList = NamedNodeMap