diff --git a/classes/pref/prefs.php b/classes/pref/prefs.php
index 45926981f..45216d20e 100644
--- a/classes/pref/prefs.php
+++ b/classes/pref/prefs.php
@@ -63,6 +63,7 @@ class Pref_Prefs extends Handler_Protected {
 				Prefs::SHORT_DATE_FORMAT,
 				'BLOCK_SEPARATOR',
 				Prefs::SSL_CERT_SERIAL,
+				'BLOCK_SEPARATOR',
 				Prefs::HEADLINES_NO_DISTINCT,
 			]
 		];