diff --git a/header/src/main/java/org/zstack/header/vm/metadata/VmInstanceMetadataDTO.java b/header/src/main/java/org/zstack/header/vm/metadata/VmInstanceMetadataDTO.java
index 311ddbde784..0569d50d1bf 100644
--- a/header/src/main/java/org/zstack/header/vm/metadata/VmInstanceMetadataDTO.java
+++ b/header/src/main/java/org/zstack/header/vm/metadata/VmInstanceMetadataDTO.java
@@ -9,6 +9,7 @@ public class VmInstanceMetadataDTO {
     private List<VolumeResourceMetadata> volumes;
     private List<ResourceMetadata> nics;
     private List<String> snapshots;
+    private List<String> snapshotTrees;
     private List<String> snapshotGroups;
     private List<String> snapshotGroupRefs;
 
@@ -60,6 +61,14 @@ public void setSnapshots(List<String> snapshots) {
         this.snapshots = snapshots;
     }
 
+    public List<String> getSnapshotTrees() {
+        return snapshotTrees;
+    }
+
+    public void setSnapshotTrees(List<String> snapshotTrees) {
+        this.snapshotTrees = snapshotTrees;
+    }
+
     public List<String> getSnapshotGroups() {
         return snapshotGroups;
     }