diff --git a/sonoff/my_user_config.h b/sonoff/my_user_config.h
index a4fbfef7a..537aafaef 100644
--- a/sonoff/my_user_config.h
+++ b/sonoff/my_user_config.h
@@ -338,7 +338,7 @@
       #define MTX_ADDRESS6     0x76              // [DisplayAddress6] I2C address of sixth 8x8 matrix module
       #define MTX_ADDRESS7     0x00              // [DisplayAddress7] I2C address of seventh 8x8 matrix module
       #define MTX_ADDRESS8     0x00              // [DisplayAddress8] I2C address of eigth 8x8 matrix module
-
+  #define USE_MAX44009                           // Enable MAX44009 sensor ((I2C address 0x4a 0x4b) +5k2 code)
 #endif  // USE_I2C
 
 // -- SPI sensors ---------------------------------