diff --git a/phpBB/install/schemas/schema_data.sql b/phpBB/install/schemas/schema_data.sql
index 4f1cdf5a83..cd38f86312 100644
--- a/phpBB/install/schemas/schema_data.sql
+++ b/phpBB/install/schemas/schema_data.sql
@@ -230,6 +230,9 @@ INSERT INTO phpbb_config (config_name, config_value) VALUES ('posts_per_page', '
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('print_pm', '1');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('queue_interval', '60');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('ranks_path', 'images/ranks');
+INSERT INTO phpbb_config (config_name, config_value) VALUES ('read_notification_expire_days', '30');
+INSERT INTO phpbb_config (config_name, config_value) VALUES ('read_notification_last_gc', '0');
+INSERT INTO phpbb_config (config_name, config_value) VALUES ('read_notification_gc', '86400');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('require_activation', '0');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('referer_validation', '1');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('script_path', '');