diff --git a/packages/orchestration/src/exos/chain-hub.js b/packages/orchestration/src/exos/chain-hub.js
index 6d505f8d6cba..e59e6c7e45b2 100644
--- a/packages/orchestration/src/exos/chain-hub.js
+++ b/packages/orchestration/src/exos/chain-hub.js
@@ -1,10 +1,13 @@
 import { VowShape } from '@agoric/vow';
-import { allVows, watch } from '@agoric/vow/vat.js';
+import { heapVowTools } from '@agoric/vow/vat.js';
 import { makeHeapZone } from '@agoric/zone';
 import { E } from '@endo/far';
 import { M } from '@endo/patterns';
 import { CosmosChainInfoShape, IBCConnectionInfoShape } from '../typeGuards.js';
 
+// FIXME test thoroughly whether heap suffices for ChainHub
+const { allVows, watch } = heapVowTools;
+
 const { Fail } = assert;
 
 /**