diff --git a/chart/questions.yaml b/chart/questions.yaml
index a92d6e8..29d0587 100644
--- a/chart/questions.yaml
+++ b/chart/questions.yaml
@@ -330,6 +330,16 @@ The available volume spec options are:
     type: int
     min: 0
     default: 300
+  - variable: defaultSettings.failedBackupTTL
+    label: Failed Backup Time to Live
+    description: "In minutes. This setting determines how long Longhorn will keep the backup resource that was failed. Set to 0 to disable the auto-deletion.
+Failed backups will be checked and cleaned up during backupstore polling which is controlled by **Backupstore Poll Interval** setting.
+Hence this value determines the minimal wait interval of the cleanup. And the actual cleanup interval is multiple of **Backupstore Poll Interval**.
+			Disabling **Backupstore Poll Interval** also means to disable failed backup auto-deletion."
+    group: "Longhorn Default Settings"
+    type: int
+    min: 0
+    default: 1440
   - variable: defaultSettings.autoSalvage
     label: Automatic salvage
     description: "If enabled, volumes will be automatically salvaged when all the replicas become faulty e.g. due to network disconnection. Longhorn will try to figure out which replica(s) are usable, then use them for the volume. By default true."
diff --git a/chart/templates/default-setting.yaml b/chart/templates/default-setting.yaml
index e2df564..15b73ae 100644
--- a/chart/templates/default-setting.yaml
+++ b/chart/templates/default-setting.yaml
@@ -20,6 +20,7 @@ data:
     {{ if not (kindIs "invalid" .Values.defaultSettings.defaultDataLocality) }}default-data-locality: {{ .Values.defaultSettings.defaultDataLocality }}{{ end }}
     {{ if not (kindIs "invalid" .Values.defaultSettings.defaultLonghornStaticStorageClass) }}default-longhorn-static-storage-class: {{ .Values.defaultSettings.defaultLonghornStaticStorageClass }}{{ end }}
     {{ if not (kindIs "invalid" .Values.defaultSettings.backupstorePollInterval) }}backupstore-poll-interval: {{ .Values.defaultSettings.backupstorePollInterval }}{{ end }}
+    {{ if not (kindIs "invalid" .Values.defaultSettings.failedBackupTTL) }}failed-backup-ttl: {{ .Values.defaultSettings.failedBackupTTL }}{{ end }}
     {{- if or (not (kindIs "invalid" .Values.defaultSettings.taintToleration)) (.Values.global.cattle.windowsCluster.enabled) }}
     taint-toleration: {{ $windowsDefaultSettingTaintToleration := list }}{{ $defaultSettingTaintToleration := list -}}
       {{- if and .Values.global.cattle.windowsCluster.enabled .Values.global.cattle.windowsCluster.defaultSetting.taintToleration -}}
diff --git a/chart/values.yaml b/chart/values.yaml
index 61d788d..9d9684f 100644
--- a/chart/values.yaml
+++ b/chart/values.yaml
@@ -108,6 +108,7 @@ defaultSettings:
   defaultReplicaCount: ~
   defaultLonghornStaticStorageClass: ~
   backupstorePollInterval: ~
+  failedBackupTTL: ~
   taintToleration: ~
   systemManagedComponentsNodeSelector: ~
   priorityClass: ~