diff --git a/backup/backup.class.php b/backup/backup.class.php
index 985a2de9ac4..c6b3636f68f 100644
--- a/backup/backup.class.php
+++ b/backup/backup.class.php
@@ -159,7 +159,7 @@ abstract class backup implements checksumable {
     /**
      * Usually same than major release zero version, mainly for informative/historic purposes.
      */
-    const RELEASE = '5.0';
+    const RELEASE = '5.1';
 
     /**
      * Cipher to be used in backup and restore operations.