diff --git a/app/javascript/mastodon/features/compose/containers/warning_container.jsx b/app/javascript/mastodon/features/compose/containers/warning_container.jsx
index 7a212342c79..434227a1adc 100644
--- a/app/javascript/mastodon/features/compose/containers/warning_container.jsx
+++ b/app/javascript/mastodon/features/compose/containers/warning_container.jsx
@@ -27,7 +27,7 @@ const WarningWrapper = ({ needsLockWarning, hashtagWarning, directMessageWarning
   if (directMessageWarning) {
     const message = (
       <span>
-        <FormattedMessage id='compose_form.encryption_warning' defaultMessage='Posts on Mastodon are not end-to-end encrypted. Do not share any dangerous information over Mastodon.' /> <a href='/terms' target='_blank'><FormattedMessage id='compose_form.direct_message_warning_learn_more' defaultMessage='Learn more' /></a>
+        <FormattedMessage id='compose_form.encryption_warning' defaultMessage='Posts on Mastodon are not end-to-end encrypted, and mentioned users can see these posts. Do not share any dangerous information over Mastodon.' /> <a href='/terms' target='_blank'><FormattedMessage id='compose_form.direct_message_warning_learn_more' defaultMessage='Learn more' /></a>
       </span>
     );
 
diff --git a/app/javascript/mastodon/features/direct_timeline/index.jsx b/app/javascript/mastodon/features/direct_timeline/index.jsx
index 4e6d0c3e72f..3362666278b 100644
--- a/app/javascript/mastodon/features/direct_timeline/index.jsx
+++ b/app/javascript/mastodon/features/direct_timeline/index.jsx
@@ -99,7 +99,7 @@ class DirectTimeline extends PureComponent {
           timelineId='direct'
           bindToDocument={!multiColumn}
           onLoadMore={this.handleLoadMore}
-          prepend={<div className='follow_requests-unlocked_explanation'><span><FormattedMessage id='compose_form.encryption_warning' defaultMessage='Posts on Mastodon are not end-to-end encrypted. Do not share any dangerous information over Mastodon.' /> <a href='/terms' target='_blank'><FormattedMessage id='compose_form.direct_message_warning_learn_more' defaultMessage='Learn more' /></a></span></div>}
+          prepend={<div className='follow_requests-unlocked_explanation'><span><FormattedMessage id='compose_form.encryption_warning' defaultMessage='Posts on Mastodon are not end-to-end encrypted, and mentioned users can see these posts. Do not share any dangerous information over Mastodon.' /> <a href='/terms' target='_blank'><FormattedMessage id='compose_form.direct_message_warning_learn_more' defaultMessage='Learn more' /></a></span></div>}
           alwaysPrepend
           emptyMessage={<FormattedMessage id='empty_column.direct' defaultMessage="You don't have any private mentions yet. When you send or receive one, it will show up here." />}
         />
diff --git a/app/javascript/mastodon/locales/en.json b/app/javascript/mastodon/locales/en.json
index 05d7d16564c..ddf34eee9a8 100644
--- a/app/javascript/mastodon/locales/en.json
+++ b/app/javascript/mastodon/locales/en.json
@@ -140,7 +140,7 @@
   "compose.published.open": "Open",
   "compose.saved.body": "Post saved.",
   "compose_form.direct_message_warning_learn_more": "Learn more",
-  "compose_form.encryption_warning": "Posts on Mastodon are not end-to-end encrypted. Do not share any sensitive information over Mastodon.",
+  "compose_form.encryption_warning": "Posts on Mastodon are not end-to-end encrypted, and mentioned users can see these posts. Do not share any sensitive information over Mastodon.",
   "compose_form.hashtag_warning": "This post won't be listed under any hashtag as it is not public. Only public posts can be searched by hashtag.",
   "compose_form.lock_disclaimer": "Your account is not {locked}. Anyone can follow you to view your follower-only posts.",
   "compose_form.lock_disclaimer.lock": "locked",