diff --git a/platformio.ini b/platformio.ini
index fe4893b69..39440fa66 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -81,6 +81,15 @@ build_flags =
 ; VTABLES in IRAM
 ;  -DVTABLES_IN_IRAM
 
+; if using esp8266 core 2.5.0 (stage) or up
+; enable one option set -> No exception recommended
+; No exception code in firmware
+;  -fno-exceptions
+;  -lstdc++-nox
+; Exception code in firmware /needs much space! 90k
+;  -fexceptions
+;  -lstdc++  
+
 ; *** Serial Monitor options
 monitor_speed = 115200