diff --git a/packages/svelte/src/internal/client/dom/blocks/boundary.js b/packages/svelte/src/internal/client/dom/blocks/boundary.js
index 1706a60513..8006ad86cd 100644
--- a/packages/svelte/src/internal/client/dom/blocks/boundary.js
+++ b/packages/svelte/src/internal/client/dom/blocks/boundary.js
@@ -41,9 +41,6 @@ export function boundary(node, props, children) {
 }
 
 export class Boundary {
-	/** @type {Boundary | null} */
-	parent;
-
 	/** @type {TemplateNode} */
 	#anchor;
 
@@ -79,8 +76,6 @@ export class Boundary {
 
 		this.#hydrate_open = hydrate_node;
 
-		this.parent = /** @type {Effect} */ (active_effect).b;
-
 		this.#effect = block(() => {
 			/** @type {Effect} */ (active_effect).b = this;