diff --git a/grbl/defaults.h b/grbl/defaults.h
index 2e46130..46fee6a 100644
--- a/grbl/defaults.h
+++ b/grbl/defaults.h
@@ -63,6 +63,19 @@
   #define DEFAULT_HOMING_SEEK_RATE 500.0 // mm/min
   #define DEFAULT_HOMING_DEBOUNCE_DELAY 250 // msec (0-65k)
   #define DEFAULT_HOMING_PULLOFF 1.0 // mm
+  #ifdef USE_ADC
+    #define DEFAULT_ENABLE_ADC 1 // Setting bit for marking ADC as on
+    #define DEFAULT_ADC_MODE ADC_CONFIG_MODE_SW_TRIGGER // Software triggering next conversion
+    #define DEFAULT_ADC_REFERENCE ADC_CONFIG_REFERENCE_INTERNAL_1VREF // AVcc reference input voltage
+    #define DEFAULT_ADC_READINGS 4 // Times each channel is to be read
+    #define DEFAULT_ADC_RESOLUTION 8 // Integer number of bits
+    #define DEFAULT_ADC_CLOCK 125 // Integer KHz value
+    #define DEFAULT_ADC_CHANNELS_MASK ADC_CONFIG_ENABLED_CHANNELS
+    #ifdef ADC_CONFIG_SYSTEM_ALARM
+      #define DEFAULT_ADC_RANGE_CHANNEL_8_MIN ADC_CONFIG_RANGE_CHANNEL_8_MIN // Celsius degrees
+      #define DEFAULT_ADC_RANGE_CHANNEL_8_MAX ADC_CONFIG_RANGE_CHANNEL_8_MAX // Celsius degrees
+    #endif
+  #endif
 #endif
 
 #ifdef DEFAULTS_SHERLINE_5400