diff --git a/IDE/ECLIPSE/RTTHREAD/README.md b/IDE/ECLIPSE/RTTHREAD/README.md
index 1d4b91e16..e329aff57 100644
--- a/IDE/ECLIPSE/RTTHREAD/README.md
+++ b/IDE/ECLIPSE/RTTHREAD/README.md
@@ -60,10 +60,14 @@ static void test_task (void *p_arg)
 10. Now you are ready to download and debug your image on the board.
 
 
-The test results below were collected from the RT-Thread ART-Pi (STM32H750XBH6) with the following software and tool chains:
+The test results below were collected from the RT-Thread ART-Pi with the following software and tool chains:
+
+- STM32H750XBH6
 
 - RT-Thread Studio (Version: 2.0.0)
 
+- GNU ARM Cross C Compiler (Optimization level: -O0)
+
 - The starting project is based on [RT-Thread ART-Pi SDK](https://github.com/RT-Thread-Studio/sdk-bsp-stm32h750-realthread-artpi) (./projects/art_pi_wifi)
 
 - wolfssl [latest version](https://github.com/wolfSSL/wolfssl)