diff --git a/app/javascript/flavours/glitch/features/composer/index.js b/app/javascript/flavours/glitch/features/composer/index.js
index c565b3474..0ee960ae0 100644
--- a/app/javascript/flavours/glitch/features/composer/index.js
+++ b/app/javascript/flavours/glitch/features/composer/index.js
@@ -47,13 +47,24 @@ import { me } from 'flavours/glitch/util/initial_state';
 import { isMobile } from 'flavours/glitch/util/is_mobile';
 import { assignHandlers } from 'flavours/glitch/util/react_helpers';
 import { wrap } from 'flavours/glitch/util/redux_helpers';
+import { privacyPreference } from 'flavours/glitch/util/privacy_preference';
 
 //  State mapping.
 function mapStateToProps (state) {
   const inReplyTo = state.getIn(['compose', 'in_reply_to']);
   const replyPrivacy = inReplyTo ? state.getIn(['statuses', inReplyTo, 'visibility']) : null;
   const sideArmBasePrivacy = state.getIn(['local_settings', 'side_arm']);
-  const sideArmPrivacy = (state.getIn(['local_settings', 'side_arm_reply_mode']) === 'copy' ? replyPrivacy : null) || sideArmBasePrivacy;
+  const sideArmRestrictedPrivacy = replyPrivacy ? privacyPreference(replyPrivacy, sideArmBasePrivacy) : null;
+  let sideArmPrivacy = null;
+  switch (state.getIn(['local_settings', 'side_arm_reply_mode'])) {
+    case 'copy':
+      sideArmPrivacy = replyPrivacy;
+      break;
+    case 'restrict':
+      sideArmPrivacy = sideArmRestrictedPrivacy;
+      break;
+  }
+  sideArmPrivacy = sideArmPrivacy || sideArmBasePrivacy;
   return {
     acceptContentTypes: state.getIn(['media_attachments', 'accept_content_types']).toArray().join(','),
     advancedOptions: state.getIn(['compose', 'advanced_options']),
diff --git a/app/javascript/flavours/glitch/features/local_settings/page/index.js b/app/javascript/flavours/glitch/features/local_settings/page/index.js
index 18c7caa18..d3b7b00b5 100644
--- a/app/javascript/flavours/glitch/features/local_settings/page/index.js
+++ b/app/javascript/flavours/glitch/features/local_settings/page/index.js
@@ -16,6 +16,7 @@ const messages = defineMessages({
   side_arm_none: { id: 'settings.side_arm.none', defaultMessage: 'None' },
   side_arm_keep: { id: 'settings.side_arm_reply_mode.keep', defaultMessage: 'Keep secondary toot button to set privacy' },
   side_arm_copy: { id: 'settings.side_arm_reply_mode.copy', defaultMessage: 'Copy privacy setting of the toot being replied to' },
+  side_arm_restrict: { id: 'settings.side_arm_reply_mode.restrict', defaultMessage: 'Restrict privacy setting to that of the toot being replied to' },
 });
 
 @injectIntl
@@ -84,7 +85,8 @@ export default class LocalSettingsPage extends React.PureComponent {
             id='mastodon-settings--side_arm_reply_mode'
             options={[
               { value: 'keep', message: intl.formatMessage(messages.side_arm_keep) },
-              { value: 'copy', message: intl.formatMessage(messages.side_arm_copy) }
+              { value: 'copy', message: intl.formatMessage(messages.side_arm_copy) },
+              { value: 'restrict', message: intl.formatMessage(messages.side_arm_restrict) },
             ]}
             onChange={onChange}
           >