diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
index ae60f3d..cc6f8ca 100644
--- a/src/cpp/server/server_builder.cc
+++ b/src/cpp/server/server_builder.cc
@@ -51,6 +51,16 @@
   async_services_.push_back(service);
 }
 
+void ServerBuilder::RegisterAnonymousService(AnonymousService* service) {
+  if (anonymous_service_) {
+    gpr_log(GPR_ERROR,
+            "Adding multiple AnonymousService is unsupported for now. "
+            "Dropping the service %p", service);
+    return;
+  }
+  anonymous_service_ = service;
+}
+
 void ServerBuilder::AddPort(const grpc::string& addr) {
   ports_.push_back(addr);
 }
@@ -89,6 +99,9 @@
       return nullptr;
     }
   }
+  if (anonymous_service_) {
+    server->RegisterAnonymousService(anonymous_service_);
+  }
   for (auto& port : ports_) {
     if (!server->AddPort(port)) {
       return nullptr;