diff --git a/ArduinoBoardManager.h b/ArduinoBoardManager.h
index c144c40..adfe071 100644
--- a/ArduinoBoardManager.h
+++ b/ArduinoBoardManager.h
@@ -113,7 +113,7 @@ class ArduinoBoardManager {
   static const unsigned long SRAM_SIZE = 96000;
   static const unsigned long EEPROM_SIZE = 0;
   static const unsigned long FLASH_SIZE = 512000;
-#elif defined(__AVR_Atmega32U4__) // Yun 16Mhz, Micro, Leonardo, Esplora
+#elif defined(__AVR_ATmega32U4__) // Yun 16Mhz, Micro, Leonardo, Esplora
   static const uint8_t BOARD = 0x04;
   static const uint8_t NUM_BITS = 8;
   static const uint16_t CPU = __AVR_Atmega32U4__;