diff --git a/src/Custom-sample.h b/src/Custom-sample.h
index 7f6aba06ca..fb806bb7d9 100644
--- a/src/Custom-sample.h
+++ b/src/Custom-sample.h
@@ -539,6 +539,7 @@ static const char DATA_ESPEASY_DEFAULT_MIN_CSS[] PROGMEM = {
 // #define USES_P159   // Presence - LD2410 Radar detection
 
 // #define USES_P164   // Gases - ENS16x TVOC/eCO2
+// #define USES_P166   // Output - GP8403 Dual channel DAC (Digital Analog Converter)
 /*
  #######################################################################################################
  ###########     Controllers