diff --git a/packages/react/src/types/nodes.ts b/packages/react/src/types/nodes.ts
index 9214778c..8dc213d7 100644
--- a/packages/react/src/types/nodes.ts
+++ b/packages/react/src/types/nodes.ts
@@ -12,7 +12,7 @@ import { NodeTypes } from './general';
  */
 export type Node<
   NodeData extends Record<string, unknown> = Record<string, unknown>,
-  NodeType extends string | undefined = undefined
+  NodeType extends string | undefined = string | undefined
 > = NodeBase<NodeData, NodeType> & {
   style?: CSSProperties;
   className?: string;
diff --git a/packages/svelte/src/lib/types/nodes.ts b/packages/svelte/src/lib/types/nodes.ts
index 266f7cc3..f861c13b 100644
--- a/packages/svelte/src/lib/types/nodes.ts
+++ b/packages/svelte/src/lib/types/nodes.ts
@@ -16,7 +16,7 @@ export type InternalNode<NodeType extends Node = Node> = InternalNodeBase<NodeTy
  */
 export type Node<
   NodeData extends Record<string, unknown> = Record<string, unknown>,
-  NodeType extends string | undefined = undefined
+  NodeType extends string | undefined = string | undefined
 > = NodeBase<NodeData, NodeType> & {
   class?: ClassValue;
   style?: string;