diff --git a/app/javascript/mastodon/features/account/components/header.js b/app/javascript/mastodon/features/account/components/header.js
index 11ae58905..8604e7167 100644
--- a/app/javascript/mastodon/features/account/components/header.js
+++ b/app/javascript/mastodon/features/account/components/header.js
@@ -16,6 +16,7 @@ const messages = defineMessages({
   unblock: { id: 'account.unblock', defaultMessage: 'Unblock @{name}' },
   edit_profile: { id: 'account.edit_profile', defaultMessage: 'Edit profile' },
   linkVerifiedOn: { id: 'account.link_verified_on', defaultMessage: 'Ownership of this link was checked on {date}' },
+  account_locked: { id: 'account.locked_info', defaultMessage: 'This account privacy status is set to locked. The owner manually reviews who can follow them.' },
 });
 
 const dateFormatOptions = {
@@ -148,7 +149,7 @@ class Header extends ImmutablePureComponent {
     }
 
     if (account.get('locked')) {
-      lockedIcon = <i className='fa fa-lock' />;
+      lockedIcon = <i className='fa fa-lock' title={intl.formatMessage(messages.account_locked)} />;
     }
 
     const content         = { __html: account.get('note_emojified') };
diff --git a/app/javascript/mastodon/locales/en.json b/app/javascript/mastodon/locales/en.json
index b39e321f2..9a15d84b7 100644
--- a/app/javascript/mastodon/locales/en.json
+++ b/app/javascript/mastodon/locales/en.json
@@ -17,6 +17,7 @@
   "account.follows_you": "Follows you",
   "account.hide_reblogs": "Hide boosts from @{name}",
   "account.link_verified_on": "Ownership of this link was checked on {date}",
+  "account.locked_info": "This account privacy status is set to locked. The owner manually reviews who can follow them.",
   "account.media": "Media",
   "account.mention": "Mention @{name}",
   "account.moved_to": "{name} has moved to:",
diff --git a/app/javascript/mastodon/locales/pl.json b/app/javascript/mastodon/locales/pl.json
index 3679b8a2b..ae673cf9f 100644
--- a/app/javascript/mastodon/locales/pl.json
+++ b/app/javascript/mastodon/locales/pl.json
@@ -17,6 +17,7 @@
   "account.follows_you": "Śledzi Cię",
   "account.hide_reblogs": "Ukryj podbicia od @{name}",
   "account.link_verified_on": "Własność tego odnośnika została potwierdzona {date}",
+  "account.locked_info": "To konto jest prywatne. Właściciel ręcznie wybiera kto może go śledzić.",
   "account.media": "Zawartość multimedialna",
   "account.mention": "Wspomnij o @{name}",
   "account.moved_to": "{name} przeniósł(-osła) się do:",