diff --git a/makefile b/makefile
index 66757de..6f8d953 100644
--- a/makefile
+++ b/makefile
@@ -6,7 +6,7 @@ CC=avr-g++
 OBJCOPY=avr-objcopy
 CFLAGS=-Wall -g  -mmcu=${MCU} -DF_CPU=${F_CPU} -I.
 TARGET=main
-SRCS= $(wildcard src/*.cpp) test/usart.cpp
+SRCS= $(wildcard src/*.cpp) test/usart/src/usart.cpp
 
 all: build flash