add more missing headers
diff --git a/build.json b/build.json
index 413863f..d06bf7a 100644
--- a/build.json
+++ b/build.json
@@ -411,13 +411,15 @@
         "include/grpc++/impl/internal_stub.h",
         "include/grpc++/impl/rpc_method.h",
         "include/grpc++/impl/rpc_service_method.h",
+        "include/grpc++/impl/service_type.h",
         "include/grpc++/server.h",
         "include/grpc++/server_builder.h",
         "include/grpc++/server_context.h",
         "include/grpc++/server_credentials.h",
         "include/grpc++/status.h",
         "include/grpc++/status_code_enum.h",
-        "include/grpc++/stream.h"
+        "include/grpc++/stream.h",
+        "include/grpc++/thread_pool_interface.h"
       ],
       "headers": [
         "src/cpp/client/channel.h",