diff --git a/platformio.ini b/platformio.ini
index 98676c11e0..ec73bc5658 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -120,6 +120,7 @@ build_flags =
   -D DECODE_SAMSUNG=true
   -D DECODE_LG=true
   -DWLED_USE_MY_CONFIG
+  -D WLED_PS_DONT_REPLACE_FX ; PS replacement FX are purely a flash memory saving feature, do not replace classic FX until we run out of flash
 
 build_unflags =