diff --git a/platform.txt b/platform.txt
index ea8094077a..3f73498881 100644
--- a/platform.txt
+++ b/platform.txt
@@ -11,7 +11,7 @@ version=2.3.0
 runtime.tools.xtensa-lx106-elf-gcc.path={runtime.platform.path}/tools/xtensa-lx106-elf
 runtime.tools.esptool.path={runtime.platform.path}/tools/esptool
 
-compiler.warning_flags=-w
+compiler.warning_flags=
 compiler.warning_flags.none=-w
 compiler.warning_flags.default=
 compiler.warning_flags.more=-Wall