diff --git a/packages/boot/test/bootstrapTests/vtransfer.test.ts b/packages/boot/test/bootstrapTests/vtransfer.test.ts
index 887cf349e4a..5e6221a2e14 100644
--- a/packages/boot/test/bootstrapTests/vtransfer.test.ts
+++ b/packages/boot/test/bootstrapTests/vtransfer.test.ts
@@ -6,7 +6,8 @@ import type { TestFn } from 'ava';
 import type { ScopedBridgeManager } from '@agoric/vats';
 import type { TransferMiddleware } from '@agoric/vats/src/transfer.js';
 import type { TransferVat } from '@agoric/vats/src/vat-transfer.js';
-import { BridgeId, VTRANSFER_IBC_EVENT } from '@agoric/internal';
+import { BridgeId } from '@agoric/internal';
+import { VTRANSFER_IBC_EVENT } from '@agoric/internal/src/action-types.js';
 import { makeSwingsetTestKit } from '../../tools/supports.ts';
 
 const makeDefaultTestContext = async t => {
diff --git a/packages/cosmic-swingset/src/launch-chain.js b/packages/cosmic-swingset/src/launch-chain.js
index c521e79bdbf..4dae3e8337b 100644
--- a/packages/cosmic-swingset/src/launch-chain.js
+++ b/packages/cosmic-swingset/src/launch-chain.js
@@ -581,6 +581,11 @@ export async function launch({
         break;
       }
 
+      case ActionType.VTRANSFER_IBC_EVENT: {
+        p = doBridgeInbound(BRIDGE_ID.VTRANSFER, action, inboundNum);
+        break;
+      }
+
       case ActionType.PLEASE_PROVISION: {
         p = doBridgeInbound(BRIDGE_ID.PROVISION, action, inboundNum);
         break;
diff --git a/packages/internal/src/action-types.js b/packages/internal/src/action-types.js
index a7dec994dff..f07a3fd5592 100644
--- a/packages/internal/src/action-types.js
+++ b/packages/internal/src/action-types.js
@@ -15,3 +15,4 @@ export const VBANK_BALANCE_UPDATE = 'VBANK_BALANCE_UPDATE';
 export const WALLET_ACTION = 'WALLET_ACTION';
 export const WALLET_SPEND_ACTION = 'WALLET_SPEND_ACTION';
 export const INSTALL_BUNDLE = 'INSTALL_BUNDLE';
+export const VTRANSFER_IBC_EVENT = 'VTRANSFER_IBC_EVENT';
diff --git a/packages/internal/src/config.js b/packages/internal/src/config.js
index 5e9ce91c9bd..cb4201f75ae 100644
--- a/packages/internal/src/config.js
+++ b/packages/internal/src/config.js
@@ -30,8 +30,6 @@ export const BridgeId = /** @type {const} */ ({
 harden(BridgeId);
 /** @typedef {(typeof BridgeId)[keyof typeof BridgeId]} BridgeIdValue */
 
-export const VTRANSFER_IBC_EVENT = 'VTRANSFER_IBC_EVENT';
-
 export const CosmosInitKeyToBridgeId = {
   vbankPort: BridgeId.BANK,
   vibcPort: BridgeId.DIBC,
diff --git a/packages/vats/src/proposals/transfer-proposal.js b/packages/vats/src/proposals/transfer-proposal.js
index 594bc3297ad..9e31474d893 100644
--- a/packages/vats/src/proposals/transfer-proposal.js
+++ b/packages/vats/src/proposals/transfer-proposal.js
@@ -1,6 +1,7 @@
 // @ts-check
 import { E } from '@endo/far';
-import { BridgeId as BRIDGE_ID, VTRANSFER_IBC_EVENT } from '@agoric/internal';
+import { BridgeId as BRIDGE_ID } from '@agoric/internal';
+import { VTRANSFER_IBC_EVENT } from '@agoric/internal/src/action-types.js';
 
 /**
  * @param {BootstrapPowers & {
diff --git a/packages/vats/src/transfer.js b/packages/vats/src/transfer.js
index a9a04bd36a7..5e114b1f49c 100644
--- a/packages/vats/src/transfer.js
+++ b/packages/vats/src/transfer.js
@@ -1,7 +1,7 @@
 // @ts-check
 import { E } from '@endo/far';
 import { M } from '@endo/patterns';
-import { VTRANSFER_IBC_EVENT } from '@agoric/internal';
+import { VTRANSFER_IBC_EVENT } from '@agoric/internal/src/action-types.js';
 import { coerceToByteSource, byteSourceToBase64 } from '@agoric/network';
 import { TargetAppI, AppTransformerI } from './bridge-target.js';
 
diff --git a/packages/vats/test/localchain.test.js b/packages/vats/test/localchain.test.js
index 3a267c8150d..196ec31109f 100644
--- a/packages/vats/test/localchain.test.js
+++ b/packages/vats/test/localchain.test.js
@@ -7,7 +7,7 @@ import { reincarnate } from '@agoric/swingset-liveslots/tools/setup-vat-data.js'
 import { withAmountUtils } from '@agoric/zoe/tools/test-utils.js';
 import { makeDurableZone } from '@agoric/zone/durable.js';
 import { getInterfaceOf } from '@endo/marshal';
-import { VTRANSFER_IBC_EVENT } from '@agoric/internal';
+import { VTRANSFER_IBC_EVENT } from '@agoric/internal/src/action-types.js';
 import { prepareVowTools, heapVowE as E } from '@agoric/vow/vat.js';
 import { prepareLocalChainTools } from '../src/localchain.js';
 import { prepareBridgeTargetModule } from '../src/bridge-target.js';