diff --git a/src/packages/core/components/backoffice-modal-container/backoffice-modal-container.element.ts b/src/packages/core/components/backoffice-modal-container/backoffice-modal-container.element.ts
index 3bd005e7c7..61cd3892a0 100644
--- a/src/packages/core/components/backoffice-modal-container/backoffice-modal-container.element.ts
+++ b/src/packages/core/components/backoffice-modal-container/backoffice-modal-container.element.ts
@@ -41,7 +41,7 @@ export class UmbBackofficeModalContainerElement extends UmbLitElement {
 	 * @param modals
 	 */
 	#createModalElements(modals: Array<UmbModalContext>) {
-		this.removeAttribute('fill-background');
+		this.fillBackground = false;
 		const oldValue = this._modals;
 		this._modals = modals;