diff --git a/include/grpc++/impl/codegen/async_unary_call.h b/include/grpc++/impl/codegen/async_unary_call.h
index 41b3ae3f284..6da64f0da1e 100644
--- a/include/grpc++/impl/codegen/async_unary_call.h
+++ b/include/grpc++/impl/codegen/async_unary_call.h
@@ -307,6 +307,11 @@ class default_delete<grpc::ClientAsyncResponseReader<R>> {
  public:
   void operator()(void* p) {}
 };
+template <class R>
+class default_delete<grpc::ClientAsyncResponseReaderInterface<R>> {
+ public:
+  void operator()(void* p) {}
+};
 }
 
 #endif  // GRPCXX_IMPL_CODEGEN_ASYNC_UNARY_CALL_H