diff --git a/web/modals/threads/members/add-members-group.react.js b/web/modals/threads/members/add-members-group.react.js
index 8fb56d08f..108cc44cd 100644
--- a/web/modals/threads/members/add-members-group.react.js
+++ b/web/modals/threads/members/add-members-group.react.js
@@ -1,44 +1,47 @@
 // @flow
 
 import * as React from 'react';
 
 import type { UserListItem } from 'lib/types/user-types';
 
 import AddMembersItem from './add-members-item.react';
 import css from './members-modal.css';
 
 type AddMemberItemGroupProps = {
-  +header: string,
+  +header: ?string,
   +userInfos: $ReadOnlyArray<UserListItem>,
   +onUserClick: (userID: string) => void,
   +usersAdded: $ReadOnlySet<string>,
 };
 function AddMembersItemGroup(props: AddMemberItemGroupProps): React.Node {
   const { userInfos, onUserClick, usersAdded, header } = props;
 
   const sortedUserInfos = React.useMemo(() => {
     return [...userInfos].sort((a, b) => a.username.localeCompare(b.username));
   }, [userInfos]);
 
   const userInfosComponents = React.useMemo(
     () =>
       sortedUserInfos.map(userInfo => (
         <AddMembersItem
           key={userInfo.id}
           userInfo={userInfo}
           onClick={onUserClick}
           userAdded={usersAdded.has(userInfo.id)}
         />
       )),
     [onUserClick, sortedUserInfos, usersAdded],
   );
+  const headerComponent = header ? (
+    <div className={css.addMemberItemsGroupHeader}>{header}:</div>
+  ) : null;
 
   return (
     <>
-      <div className={css.addMemberItemsGroupHeader}>{header}:</div>
+      {headerComponent}
       {userInfosComponents}
     </>
   );
 }
 
 export default AddMembersItemGroup;
diff --git a/web/modals/threads/members/add-members-list.react.js b/web/modals/threads/members/add-members-list.react.js
index 70966d9ad..ba1a90bc9 100644
--- a/web/modals/threads/members/add-members-list.react.js
+++ b/web/modals/threads/members/add-members-list.react.js
@@ -1,79 +1,85 @@
 // @flow
 
 import _groupBy from 'lodash/fp/groupBy';
 import _toPairs from 'lodash/fp/toPairs';
 import * as React from 'react';
 
 import type { UserListItem } from 'lib/types/user-types';
 
 import AddMembersItemGroup from './add-members-group.react';
 
 type Props = {
   +userListItems: $ReadOnlyArray<UserListItem>,
   +pendingUsersToAdd: $ReadOnlySet<string>,
   +switchUser: string => void,
+  +hasParentThread: boolean,
 };
 
 function AddMembersList(props: Props): React.Node {
-  const { userListItems, pendingUsersToAdd, switchUser } = props;
+  const {
+    userListItems,
+    pendingUsersToAdd,
+    switchUser,
+    hasParentThread,
+  } = props;
 
   const usersAvailableToAdd = React.useMemo(
     () => userListItems.filter(user => !user.alertText),
     [userListItems],
   );
 
   const groupedAvailableUsersList = React.useMemo(
     () => _groupBy(userInfo => userInfo.notice)(usersAvailableToAdd),
     [usersAvailableToAdd],
   );
 
-  const membersInParentThread = React.useMemo(
-    () =>
-      groupedAvailableUsersList['undefined']
-        ? ['Users in parent channel', groupedAvailableUsersList['undefined']]
-        : undefined,
-    [groupedAvailableUsersList],
-  );
+  const membersInParentThread = React.useMemo(() => {
+    if (!groupedAvailableUsersList['undefined']) {
+      return;
+    }
+    const label = hasParentThread ? 'Users in parent channel' : null;
+    return [label, groupedAvailableUsersList['undefined']];
+  }, [groupedAvailableUsersList, hasParentThread]);
 
   const membersNotInParentThread = React.useMemo(
     () =>
       _toPairs(groupedAvailableUsersList)
         .filter(group => group[0] !== 'undefined')
         .sort((a, b) => a[0].localeCompare(b[0]))
         .map(([header, users]) => [
           header.charAt(0).toUpperCase() + header.substring(1),
           users,
         ]),
     [groupedAvailableUsersList],
   );
 
   const usersUnavailableToAdd = React.useMemo(() => {
     const usersUnavailable = userListItems.filter(user => user.alertText);
     if (!usersUnavailable.length) {
       return null;
     }
     return ['Unavailable users', usersUnavailable];
   }, [userListItems]);
 
   const sortedGroupedUsersList = React.useMemo(
     () =>
       [
         membersInParentThread,
         ...membersNotInParentThread,
         usersUnavailableToAdd,
       ].filter(Boolean),
     [membersInParentThread, membersNotInParentThread, usersUnavailableToAdd],
   );
 
   return sortedGroupedUsersList.map(([header, userInfos]) => (
     <AddMembersItemGroup
       key={header}
       header={header}
       userInfos={userInfos}
       onUserClick={switchUser}
       usersAdded={pendingUsersToAdd}
     />
   ));
 }
 
 export default AddMembersList;
diff --git a/web/modals/threads/members/add-members-modal.react.js b/web/modals/threads/members/add-members-modal.react.js
index a170ea06c..771a0a6be 100644
--- a/web/modals/threads/members/add-members-modal.react.js
+++ b/web/modals/threads/members/add-members-modal.react.js
@@ -1,195 +1,196 @@
 // @flow
 
 import * as React from 'react';
 
 import {
   changeThreadSettingsActionTypes,
   changeThreadSettings,
 } from 'lib/actions/thread-actions';
 import { threadInfoSelector } from 'lib/selectors/thread-selectors';
 import {
   userSearchIndexForPotentialMembers,
   userInfoSelectorForPotentialMembers,
 } from 'lib/selectors/user-selectors';
 import { getPotentialMemberItems } from 'lib/shared/search-utils';
 import { threadActualMembers } from 'lib/shared/thread-utils';
 import {
   useDispatchActionPromise,
   useServerCall,
 } from 'lib/utils/action-utils';
 
 import Button from '../../../components/button.react';
 import Label from '../../../components/label.react';
 import { useSelector } from '../../../redux/redux-utils';
 import SearchModal from '../../search-modal.react';
 import AddMembersList from './add-members-list.react';
 import css from './members-modal.css';
 
 type ContentProps = {
   +searchText: string,
   +threadID: string,
   +onClose: () => void,
 };
 
 function AddMembersModalContent(props: ContentProps): React.Node {
   const { searchText, threadID, onClose } = props;
 
   const [pendingUsersToAdd, setPendingUsersToAdd] = React.useState<
     $ReadOnlySet<string>,
   >(new Set());
 
   const threadInfo = useSelector(state => threadInfoSelector(state)[threadID]);
   const { parentThreadID, community } = threadInfo;
   const parentThreadInfo = useSelector(state =>
     parentThreadID ? threadInfoSelector(state)[parentThreadID] : null,
   );
   const communityThreadInfo = useSelector(state =>
     community ? threadInfoSelector(state)[community] : null,
   );
   const otherUserInfos = useSelector(userInfoSelectorForPotentialMembers);
   const userSearchIndex = useSelector(userSearchIndexForPotentialMembers);
   const excludeUserIDs = React.useMemo(
     () =>
       threadActualMembers(threadInfo.members).concat(
         Array.from(pendingUsersToAdd),
       ),
     [pendingUsersToAdd, threadInfo.members],
   );
 
   const userSearchResults = React.useMemo(
     () =>
       getPotentialMemberItems(
         searchText,
         otherUserInfos,
         userSearchIndex,
         excludeUserIDs,
         parentThreadInfo,
         communityThreadInfo,
         threadInfo.type,
       ),
     [
       communityThreadInfo,
       excludeUserIDs,
       otherUserInfos,
       parentThreadInfo,
       searchText,
       threadInfo.type,
       userSearchIndex,
     ],
   );
 
   const onSwitchUser = React.useCallback(
     userID =>
       setPendingUsersToAdd(users => {
         const newUsers = new Set(users);
         if (newUsers.has(userID)) {
           newUsers.delete(userID);
         } else {
           newUsers.add(userID);
         }
         return newUsers;
       }),
     [],
   );
 
   const dispatchActionPromise = useDispatchActionPromise();
   const callChangeThreadSettings = useServerCall(changeThreadSettings);
 
   const addUsers = React.useCallback(() => {
     dispatchActionPromise(
       changeThreadSettingsActionTypes,
       callChangeThreadSettings({
         threadID,
         changes: { newMemberIDs: Array.from(pendingUsersToAdd) },
       }),
     );
     onClose();
   }, [
     callChangeThreadSettings,
     dispatchActionPromise,
     onClose,
     pendingUsersToAdd,
     threadID,
   ]);
 
   const pendingUsersWithNames = React.useMemo(
     () =>
       Array.from(pendingUsersToAdd)
         .map(userID => [userID, otherUserInfos[userID].username])
         .sort((a, b) => a[1].localeCompare(b[1])),
     [otherUserInfos, pendingUsersToAdd],
   );
 
   const labelItems = React.useMemo(() => {
     if (!pendingUsersWithNames.length) {
       return null;
     }
     return (
       <div className={css.addMembersPendingList}>
         {pendingUsersWithNames.map(([userID, username]) => (
           <Label key={userID} onClose={() => onSwitchUser(userID)}>
             {username}
           </Label>
         ))}
       </div>
     );
   }, [onSwitchUser, pendingUsersWithNames]);
 
   return (
     <div className={css.addMembersContent}>
       {labelItems}
       <div className={css.addMembersListContainer}>
         <AddMembersList
           userListItems={userSearchResults}
           switchUser={onSwitchUser}
           pendingUsersToAdd={pendingUsersToAdd}
+          hasParentThread={!!threadInfo.parentThreadID}
         />
       </div>
       <div className={css.addMembersFooter}>
         <Button onClick={onClose} variant="secondary">
           Cancel
         </Button>
         <Button
           disabled={!pendingUsersToAdd.size}
           variant="primary"
           onClick={addUsers}
         >
           Add selected members
         </Button>
       </div>
     </div>
   );
 }
 
 type Props = {
   +threadID: string,
   +onClose: () => void,
 };
 
 function AddMembersModal(props: Props): React.Node {
   const { threadID, onClose } = props;
 
   const addMembersModalContent = React.useCallback(
     (searchText: string) => (
       <AddMembersModalContent
         searchText={searchText}
         threadID={threadID}
         onClose={onClose}
       />
     ),
     [onClose, threadID],
   );
 
   return (
     <SearchModal
       name="Add members"
       searchPlaceholder="Search members"
       onClose={onClose}
       size="fit-content"
     >
       {addMembersModalContent}
     </SearchModal>
   );
 }
 
 export default AddMembersModal;