diff --git a/lib/data_update_scripts/20201019192035_backfill_registered_for_users.rb b/lib/data_update_scripts/20201019192035_backfill_registered_for_users.rb
new file mode 100644
index 000000000..033cd0782
--- /dev/null
+++ b/lib/data_update_scripts/20201019192035_backfill_registered_for_users.rb
@@ -0,0 +1,10 @@
+module DataUpdateScripts
+  class BackfillRegisteredForUsers
+    def run
+      users = User.where.not(invitation_accepted_at: nil).where(registered: false).or(User.where(registered_at: nil))
+      users.find_each do |user|
+        user.update_columns(registered: true, registered_at: user.invitation_accepted_at)
+      end
+    end
+  end
+end