diff --git a/api/backingimage.go b/api/backingimage.go
index 98d3461cb6..5137e99647 100644
--- a/api/backingimage.go
+++ b/api/backingimage.go
@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	"github.com/longhorn/longhorn-manager/datastore"
 	"github.com/pkg/errors"
 	"github.com/rancher/go-rancher/api"
 	"github.com/rancher/go-rancher/client"
@@ -36,6 +37,10 @@ func (s *Server) BackingImageGet(rw http.ResponseWriter, req *http.Request) erro
 
 	bi, err := s.m.GetBackingImage(id)
 	if err != nil {
+		if datastore.ErrorIsNotFound(err) {
+			rw.WriteHeader(http.StatusNotFound)
+			return nil
+		}
 		return errors.Wrapf(err, "failed to get backing image '%s'", id)
 	}
 
diff --git a/api/backup.go b/api/backup.go
index 7e22ee7f63..19a295200a 100644
--- a/api/backup.go
+++ b/api/backup.go
@@ -4,6 +4,7 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	"github.com/longhorn/longhorn-manager/datastore"
 	"github.com/pkg/errors"
 	"github.com/rancher/go-rancher/api"
 	"github.com/rancher/go-rancher/client"
@@ -47,6 +48,10 @@ func (s *Server) BackupVolumeGet(w http.ResponseWriter, req *http.Request) error
 
 	bv, err := s.m.GetBackupVolume(volName)
 	if err != nil {
+		if datastore.ErrorIsNotFound(err) {
+			w.WriteHeader(http.StatusNotFound)
+			return nil
+		}
 		return errors.Wrapf(err, "failed to get backup volume '%s'", volName)
 	}
 	apiContext.Write(toBackupVolumeResource(bv, apiContext))