diff --git a/sonoff/user_config.h b/sonoff/user_config.h
index 0c4aa66f5..4b45118b8 100644
--- a/sonoff/user_config.h
+++ b/sonoff/user_config.h
@@ -277,6 +277,8 @@
 //  #define USE_MGS                                // Add I2C code for Xadow and Grove Mutichannel Gas sensor using library Multichannel_Gas_Sensor (+10k code)
     #define MGS_SENSOR_ADDR    0x04              // Default Mutichannel Gas sensor i2c address
 //  #define USE_APDS9960                           // Add I2C code for APDS9960 Proximity Sensor. Disables SHT and VEML6070 (+4k7 code)
+// #define USE_MPR121                               // Enable MPR121 controller (I2C addresses 0x5A, 0x5B, 0x5C and 0x5D) in input mode for touch buttons
+ 
 #endif  // USE_I2C
 
 // -- SPI sensors ---------------------------------