diff --git a/src/core/iomgr/udp_server.h b/src/core/iomgr/udp_server.h
index 7f49068031e..fcc4ba6e97c 100644
--- a/src/core/iomgr/udp_server.h
+++ b/src/core/iomgr/udp_server.h
@@ -55,6 +55,8 @@ void grpc_udp_server_start(grpc_udp_server *server, grpc_pollset **pollsets,
                            size_t pollset_count, grpc_udp_server_cb cb,
                            void *cb_arg);
 
+int grpc_udp_server_get_fd(grpc_udp_server *s, unsigned index);
+
 /* Add a port to the server, returning port number on success, or negative
    on failure.