diff --git a/lib/actions/user-actions.js b/lib/actions/user-actions.js
--- a/lib/actions/user-actions.js
+++ b/lib/actions/user-actions.js
@@ -50,7 +50,7 @@
   SubscriptionUpdateRequest,
   SubscriptionUpdateResult,
 } from '../types/subscription-types.js';
-import type { RawThreadInfos } from '../types/thread-types';
+import type { MinimallyEncodedRawThreadInfos } from '../types/thread-types';
 import type {
   UserInfo,
   PasswordUpdate,
@@ -279,7 +279,7 @@
 
     const userInfosArrays = [];
 
-    let threadInfos: RawThreadInfos = {};
+    let threadInfos: MinimallyEncodedRawThreadInfos = {};
     const calendarResult: WritableCalendarResult = {
       calendarQuery: keyserverAuthInfo.calendarQuery,
       rawEntryInfos: [],
@@ -424,7 +424,7 @@
 
     const userInfosArrays = [];
 
-    let threadInfos: RawThreadInfos = {};
+    let threadInfos: MinimallyEncodedRawThreadInfos = {};
     const calendarResult: WritableCalendarResult = {
       calendarQuery: logInInfo.calendarQuery,
       rawEntryInfos: [],
diff --git a/lib/types/account-types.js b/lib/types/account-types.js
--- a/lib/types/account-types.js
+++ b/lib/types/account-types.js
@@ -15,7 +15,10 @@
   type GenericMessagesResult,
 } from './message-types.js';
 import type { PreRequestUserState } from './session-types.js';
-import { type RawThreadInfos } from './thread-types.js';
+import {
+  type RawThreadInfos,
+  type MinimallyEncodedRawThreadInfos,
+} from './thread-types.js';
 import {
   type UserInfo,
   type LoggedOutUserInfo,
@@ -144,14 +147,14 @@
   +rawEntryInfos?: ?$ReadOnlyArray<RawEntryInfo>,
   +serverTime: number,
   +cookieChange: {
-    +threadInfos: RawThreadInfos,
+    +threadInfos: MinimallyEncodedRawThreadInfos,
     +userInfos: $ReadOnlyArray<UserInfo>,
   },
   +notAcknowledgedPolicies?: $ReadOnlyArray<PolicyType>,
 };
 
 export type LogInResult = {
-  +threadInfos: RawThreadInfos,
+  +threadInfos: MinimallyEncodedRawThreadInfos,
   +currentUserInfo: LoggedInUserInfo,
   +messagesResult: GenericMessagesResult,
   +userInfos: $ReadOnlyArray<UserInfo>,