diff --git a/bsp/stm3210/rtconfig.py b/bsp/stm3210/rtconfig.py
index c95b9144751d2493bca6de41501d12a11c5802d1..ec3f289f02b8ce3a3cac3d8e1413ee325033a6ad 100644
--- a/bsp/stm3210/rtconfig.py
+++ b/bsp/stm3210/rtconfig.py
@@ -62,7 +62,8 @@ elif PLATFORM == 'armcc':
     EXEC_PATH += '/arm/bin40/'
 
     if BUILD == 'debug':
-        CFLAGS += ' --dwarf2'
+        CFLAGS += ' -g -O0'
+        AFLAGS += ' -g'
     else:
         CFLAGS += ' -O2'