diff --git a/bacnet-stack/ports/xplained/rs485.c b/bacnet-stack/ports/xplained/rs485.c
index 5bc6b50f..68374845 100644
--- a/bacnet-stack/ports/xplained/rs485.c
+++ b/bacnet-stack/ports/xplained/rs485.c
@@ -1,4 +1,4 @@
-/*
+/**
  * @file
  *
  * @brief RS-485 Interface