diff --git a/cores/arduino/Arduino.h b/cores/arduino/Arduino.h
index 5a5d8c4..b9a3ec8 100644
--- a/cores/arduino/Arduino.h
+++ b/cores/arduino/Arduino.h
@@ -108,8 +108,8 @@ void analogWrite(pin_t, int);
 uint16_t analogRead(pin_t);
 
 // EEPROM
-void eeprom_write_byte(unsigned char *pos, unsigned char value);
-unsigned char eeprom_read_byte(unsigned char *pos);
+void eeprom_write_byte(uint8_t *pos, unsigned char value);
+uint8_t eeprom_read_byte(uint8_t *pos);
 void eeprom_read_block (void *__dst, const void *__src, size_t __n);
 void eeprom_update_block (const void *__src, void *__dst, size_t __n);
 
diff --git a/cores/arduino/arduino.cpp b/cores/arduino/arduino.cpp
index 549e500..db667b6 100644
--- a/cores/arduino/arduino.cpp
+++ b/cores/arduino/arduino.cpp
@@ -128,11 +128,9 @@ uint16_t analogRead(pin_t adc_pin) {
 // Persistent Config Storage
 // **************************
 
-void eeprom_write_byte(unsigned char *pos, unsigned char value) {
+void eeprom_write_byte(uint8_t *pos, unsigned char value) { }
 
-}
-
-unsigned char eeprom_read_byte(uint8_t * pos) { return '\0'; }
+uint8_t eeprom_read_byte(uint8_t * pos) { return '\0'; }
 
 void eeprom_read_block(void *__dst, const void *__src, size_t __n) { }