diff --git a/backend.php b/backend.php
index 4c93f9b6d..4ee4b7862 100644
--- a/backend.php
+++ b/backend.php
@@ -56,7 +56,7 @@
 	$purge_intervals = array(
 		0  => __("Use default"),
 		-1 => __("Never purge"),
-		5  => __("1 week old"),
+		7  => __("1 week old"),
 		14 => __("2 weeks old"),
 		31 => __("1 month old"),
 		60 => __("2 months old"),