diff --git a/upup/pkg/kutil/delete_cluster_gce.go b/upup/pkg/kutil/delete_cluster_gce.go
index 8113192c63..ca719559ac 100644
--- a/upup/pkg/kutil/delete_cluster_gce.go
+++ b/upup/pkg/kutil/delete_cluster_gce.go
@@ -399,7 +399,7 @@ func (d *clusterDiscoveryGCE) listGCEDisks() ([]*ResourceTracker, error) {
 		}
 
 		for _, u := range t.Users {
-			tracker.blocked = append(tracker.blocked, typeInstance+":"+gce.LastComponent(u))
+			tracker.blocked = append(tracker.blocked, typeInstance+":"+t.Zone+"/"+gce.LastComponent(u))
 		}
 
 		glog.V(4).Infof("Found resource: %s", t.SelfLink)