diff --git a/build.json b/build.json
index 07af691..a980e94 100644
--- a/build.json
+++ b/build.json
@@ -398,6 +398,7 @@
       "build": "all",
       "language": "c++",
       "public_headers": [
+        "include/grpc++/async_unary_call.h",
         "include/grpc++/channel_arguments.h",
         "include/grpc++/channel_interface.h",
         "include/grpc++/client_context.h",