diff --git a/packages/core/src/runtime/dataspace.ts b/packages/core/src/runtime/dataspace.ts
index 431b082..c88b225 100644
--- a/packages/core/src/runtime/dataspace.ts
+++ b/packages/core/src/runtime/dataspace.ts
@@ -7,7 +7,7 @@ import { Actor, Assertion, Entity, Facet, Handle, LocalAction, Ref, Turn } from
 import { fromObserve, Observe, toObserve } from '../gen/dataspace.js';
 import * as P from '../gen/dataspacePatterns.js';
 
-export type DataspaceOptions {
+export type DataspaceOptions = {
     tracer?: (event: '+' | '-' | '!', assertion: Assertion, dataspace: Dataspace) => void,
     dumpIndex?: boolean,
 };