diff --git a/platformio.ini b/platformio.ini
index eefb038e0..59c053b67 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -54,6 +54,7 @@ build_flags =
 ;  -DPIO_FRAMEWORK_ARDUINO_LWIP2_LOW_MEMORY
 ;  -DPIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH
 ;  -DUSE_CONFIG_OVERRIDE
+  -DUSE_KNX_NO_EMULATION
 
 build_flags_4MB =
   -Wl,-Tesp8266.flash.4m1m.ld
@@ -62,6 +63,7 @@ build_flags_4MB =
 ;  -DPIO_FRAMEWORK_ARDUINO_LWIP2_LOW_MEMORY
 ;  -DPIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH
 ;  -DUSE_CONFIG_OVERRIDE
+  -DUSE_KNX_NO_EMULATION
 
 ; *** Fix Esp/Arduino core 2.4.x induced Tasmota unused floating point includes
 extra_scripts = pio/strip-floats.py