diff --git a/backend/azureblob/azureblob.go b/backend/azureblob/azureblob.go
index d9e383e83..054b8ed6a 100644
--- a/backend/azureblob/azureblob.go
+++ b/backend/azureblob/azureblob.go
@@ -1508,4 +1508,6 @@ var (
 	_ fs.ListRer   = &Fs{}
 	_ fs.Object    = &Object{}
 	_ fs.MimeTyper = &Object{}
+	_ fs.GetTierer = &Object{}
+	_ fs.SetTierer = &Object{}
 )