diff --git a/tools/platformio-build.py b/tools/platformio-build.py
index d5e04816..3ab81f24 100644
--- a/tools/platformio-build.py
+++ b/tools/platformio-build.py
@@ -44,6 +44,7 @@ env.Append(
 
     CCFLAGS=[
         "-Os",
+        "-g3",
         "-Wall",
         "-nostdlib",
         "-Wpointer-arith",