diff --git a/eeprom_min.h b/eeprom_min.h
--- a/eeprom_min.h
+++ b/eeprom_min.h
@@ -13,6 +13,8 @@
 #define EEPROM_ADDR_BREWTEMP		0x0030
 #define EEPROM_ADDR_STEAMTEMP		0x0034
 
+#define EEPROM_ADDR_UNITS		0x0038
+
 
 void Minimal_EEPROM_Unlock(void);
 void Minimal_EEPROM_Lock(void);