diff --git a/src/core/ext/xds/xds_api.cc b/src/core/ext/xds/xds_api.cc
index 89ab84ac339..679da843086 100644
--- a/src/core/ext/xds/xds_api.cc
+++ b/src/core/ext/xds/xds_api.cc
@@ -803,7 +803,9 @@ struct EncodingContext {
 class XdsResourceType {
  public:
   // A base type for resource data.
-  struct ResourceData {};
+  struct ResourceData {
+    virtual ~ResourceData() = default;
+  };
 
   struct DecodeResult {
     std::string name;