diff --git a/include/binder/Parcel.h b/include/binder/Parcel.h
index 14fd002..74e75d7 100644
--- a/include/binder/Parcel.h
+++ b/include/binder/Parcel.h
@@ -463,6 +463,11 @@
         bool mMutable;
     };
 
+    #if defined(__clang__)
+    #pragma clang diagnostic push
+    #pragma clang diagnostic ignored "-Wweak-vtables"
+    #endif
+
     class FlattenableHelperInterface {
     protected:
         ~FlattenableHelperInterface() { }
@@ -473,12 +478,18 @@
         virtual status_t unflatten(void const* buffer, size_t size, int const* fds, size_t count) = 0;
     };
 
+    #if defined(__clang__)
+    #pragma clang diagnostic pop
+    #endif
+
     template<typename T>
     class FlattenableHelper : public FlattenableHelperInterface {
         friend class Parcel;
         const Flattenable<T>& val;
         explicit FlattenableHelper(const Flattenable<T>& _val) : val(_val) { }
 
+    protected:
+        ~FlattenableHelper() = default;
     public:
         virtual size_t getFlattenedSize() const {
             return val.getFlattenedSize();