diff --git a/Makefile b/Makefile
index 4563f6e..236acbc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,10 @@
 .ONESHELL:
 
-CC=gcc
-O=2
-CFLAGS=`sdl2-config --cflags` `sdl2-config --libs`
-PREFIX=$(HOME)/.local
+CC = gcc
+O = 3
+CFLAGS = `sdl2-config --cflags` `sdl2-config --libs`
+PREFIX = $(HOME)/.local
+SRC = main.c
 
 all: ls7emulator
 
@@ -13,7 +14,7 @@ clean:
 
 ls7emulator:
 	cd src
-	$(CC) main.c -o ls7emulator $(CFLAGS) -O$(O) 
+	$(CC) $(SRC) -o ls7emulator $(CFLAGS) -O$(O) 
 	rm ../bin -rf
 	mkdir ../bin
 	cd ../bin
@@ -24,3 +25,6 @@ install: ls7emulator
 	mkdir -p $(PREFIX)/bin
 	install bin/ls7emulator $(PREFIX)/bin/ls7emulator
 	cp bin/ls7emulator /usr/bin/ls7emulator
+
+
+