diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -58,10 +58,10 @@
   type ComposableMessageInfo,
 } from '../types/message-types.js';
 import type {
-  RelativeMemberInfo,
   MinimallyEncodedRoleInfo,
   RawThreadInfo,
   MinimallyEncodedThreadCurrentUserInfo,
+  RelativeMemberInfo,
   ThreadInfo,
 } from '../types/minimally-encoded-thread-permissions-types.js';
 import {
@@ -90,9 +90,9 @@
 } from '../types/thread-types-enum.js';
 import type {
   LegacyRawThreadInfo,
+  LegacyRoleInfo,
   MemberInfo,
   ServerThreadInfo,
-  RoleInfo,
   ServerMemberInfo,
   ClientNewThreadRequest,
   NewThreadResult,
@@ -1038,7 +1038,9 @@
   return !!memberInfo.permissions[threadPermissions.CHANGE_ROLE]?.value;
 }
 
-function roleIsAdminRole(roleInfo: ?RoleInfo): boolean {
+function roleIsAdminRole(
+  roleInfo: ?LegacyRoleInfo | ?MinimallyEncodedRoleInfo,
+): boolean {
   return !!(roleInfo && !roleInfo.isDefault && roleInfo.name === 'Admins');
 }
 
diff --git a/lib/types/thread-types.js b/lib/types/thread-types.js
--- a/lib/types/thread-types.js
+++ b/lib/types/thread-types.js
@@ -18,7 +18,6 @@
   MinimallyEncodedMemberInfo,
   RawThreadInfo,
   ResolvedThreadInfo,
-  MinimallyEncodedRoleInfo,
   ThreadInfo,
 } from './minimally-encoded-thread-permissions-types.js';
 import {
@@ -68,8 +67,6 @@
     isDefault: t.Boolean,
   });
 
-export type RoleInfo = LegacyRoleInfo | MinimallyEncodedRoleInfo;
-
 export type ThreadCurrentUserInfo = {
   +role: ?string,
   +permissions: ThreadPermissionsInfo,
diff --git a/lib/utils/role-utils.js b/lib/utils/role-utils.js
--- a/lib/utils/role-utils.js
+++ b/lib/utils/role-utils.js
@@ -5,6 +5,7 @@
 import { useSelector } from './redux-utils.js';
 import { threadInfoSelector } from '../selectors/thread-selectors.js';
 import type {
+  MinimallyEncodedRoleInfo,
   RelativeMemberInfo,
   ThreadInfo,
 } from '../types/minimally-encoded-thread-permissions-types.js';
@@ -13,7 +14,7 @@
   type ThreadRolePermissionsBlob,
   type UserSurfacedPermission,
 } from '../types/thread-permission-types.js';
-import type { RoleInfo } from '../types/thread-types';
+import type { LegacyRoleInfo } from '../types/thread-types';
 import { threadTypes } from '../types/thread-types-enum.js';
 
 function constructRoleDeletionMessagePrompt(
@@ -58,7 +59,7 @@
 function useRolesFromCommunityThreadInfo(
   threadInfo: ThreadInfo,
   memberInfos: $ReadOnlyArray<RelativeMemberInfo>,
-): $ReadOnlyMap<string, ?RoleInfo> {
+): $ReadOnlyMap<string, ?LegacyRoleInfo | ?MinimallyEncodedRoleInfo> {
   // Our in-code system has chat-specific roles, while the
   // user-surfaced system has roles only for communities. We retrieve roles
   // from the top-level community thread for accuracy, with a rare fallback
@@ -73,7 +74,10 @@
     community ? threadInfoSelector(state)[community] : null,
   );
   const topMostThreadInfo = communityThreadInfo || threadInfo;
-  const roleMap = new Map<string, ?RoleInfo>();
+  const roleMap = new Map<
+    string,
+    ?LegacyRoleInfo | ?MinimallyEncodedRoleInfo,
+  >();
 
   if (topMostThreadInfo.type === threadTypes.GENESIS) {
     memberInfos.forEach(memberInfo =>