diff --git a/lib/mastodon/migration_helpers.rb b/lib/mastodon/migration_helpers.rb
index f5dc7e1c6..146eba8ec 100644
--- a/lib/mastodon/migration_helpers.rb
+++ b/lib/mastodon/migration_helpers.rb
@@ -889,7 +889,7 @@ table #{table}.
 If you are using PostgreSQL you can solve this by logging in to the GitLab
 database (#{dbname}) using a super user and running:
 
-    ALTER #{user} WITH SUPERUSER
+    ALTER USER #{user} WITH SUPERUSER
 
 For MySQL you instead need to run: