diff --git a/CMakeLists.txt b/CMakeLists.txt
index f395e78..7849e2a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -125,7 +125,7 @@ endif()
 
 if(CMAKE_CROSSCOMPILING)
   # mcu related settings
-  set(MCU_FLAGS -mmcu=atmega328)
+  set(MCU_FLAGS -mmcu=atmega32u4)
   add_compile_options(${MCU_FLAGS})
   add_link_options(${MCU_FLAGS})