diff --git a/src/Umbraco.Web.UI.Client/src/backoffice/documents/document-types/modals/allowed-document-types/allowed-document-types-modal.element.ts b/src/Umbraco.Web.UI.Client/src/backoffice/documents/document-types/modals/allowed-document-types/allowed-document-types-modal.element.ts
index 251e807759..b0533342b8 100644
--- a/src/Umbraco.Web.UI.Client/src/backoffice/documents/document-types/modals/allowed-document-types/allowed-document-types-modal.element.ts
+++ b/src/Umbraco.Web.UI.Client/src/backoffice/documents/document-types/modals/allowed-document-types/allowed-document-types-modal.element.ts
@@ -37,7 +37,8 @@ export class UmbAllowedDocumentTypesModalElement extends UmbModalBaseElement<
 	#onClick(event: PointerEvent) {
 		event.stopPropagation();
 		const target = event.target as HTMLButtonElement;
-		const documentTypeKey = target.value;
+		const documentTypeKey = target.dataset.key;
+		if (!documentTypeKey) throw new Error('No document type key found');
 		this.modalHandler?.submit({ documentTypeKey });
 	}