diff --git a/avr-gcc-toolchain.cmake b/avr-gcc-toolchain.cmake
index 6f5e353..845b877 100644
--- a/avr-gcc-toolchain.cmake
+++ b/avr-gcc-toolchain.cmake
@@ -8,9 +8,9 @@ set(CMAKE_SYSTEM_VERSION 1)
 set(CMAKE_SYSTEM_PROCESSOR avr)
 
 # Specify the compiler and linker
-set(AVR_MCU atmega328p) # The old Classic
+#set(AVR_MCU atmega328p) # The old Classic
 #set(AVR_MCU attiny85) # The older ATtiny series, avr25
-#set(AVR_MCU attiny404) # this is the avrxmega3 series
+set(AVR_MCU attiny404) # this is the avrxmega3 series
 #set(AVR_MCU avr64dd28) # Newer DX series, avrxmega2
 
 # The default frequency of an 328p devboard using the external crystal.
@@ -18,11 +18,13 @@ set(F_CPU 16000000UL)
 #set(F_CPU 8000000)
 add_compile_definitions(F_CPU=${F_CPU})
 # add_compile_definitions(MCU=atmega328p)
-add_compile_definitions(__AVR_ATmega328P__)
+#add_compile_definitions(__AVR_ATmega328P__)
+add_compile_definitions(__AVR_ATtiny404__)
 
 # Set up the programmer for it
 #set(PROGRAMMER usbasp-clone)
-set(PROGRAMMER arduino)
+#set(PROGRAMMER arduino)
+set(PROGRAMMER serialupdi)
 
 # Set the Port for the programmer
 set(PORT /dev/ttyUSB0)