diff --git a/packages/happy-dom/src/nodes/node/INode.ts b/packages/happy-dom/src/nodes/node/INode.ts
index 04d9eadbc..71d523987 100644
--- a/packages/happy-dom/src/nodes/node/INode.ts
+++ b/packages/happy-dom/src/nodes/node/INode.ts
@@ -4,6 +4,12 @@ import IElement from '../element/IElement';
 import INodeList from './INodeList';
 
 export default interface INode extends IEventTarget {
+	readonly ELEMENT_NODE: number;
+	readonly TEXT_NODE: number;
+	readonly COMMENT_NODE: number;
+	readonly DOCUMENT_NODE: number;
+	readonly DOCUMENT_TYPE_NODE: number;
+	readonly DOCUMENT_FRAGMENT_NODE: number;
 	readonly ownerDocument: IDocument;
 	readonly parentNode: INode;
 	readonly parentElement: IElement;
diff --git a/packages/happy-dom/src/nodes/node/Node.ts b/packages/happy-dom/src/nodes/node/Node.ts
index 72a684c99..4c1a4238e 100644
--- a/packages/happy-dom/src/nodes/node/Node.ts
+++ b/packages/happy-dom/src/nodes/node/Node.ts
@@ -22,6 +22,12 @@ export default class Node extends EventTarget implements INode {
 	public static readonly DOCUMENT_TYPE_NODE = 10;
 	public static readonly DOCUMENT_FRAGMENT_NODE = 11;
 	public static ownerDocument: IDocument = null;
+	public readonly ELEMENT_NODE = 1;
+	public readonly TEXT_NODE = 3;
+	public readonly COMMENT_NODE = 8;
+	public readonly DOCUMENT_NODE = 9;
+	public readonly DOCUMENT_TYPE_NODE = 10;
+	public readonly DOCUMENT_FRAGMENT_NODE = 11;
 	public readonly ownerDocument: IDocument = null;
 	public readonly parentNode: INode = null;
 	public readonly nodeType: number;