diff --git a/README.md b/README.md
index ed4e980..377302c 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1 @@
-* (define fac (lambda (n) (if ((== n 0) 1) (1 (* n (fac (+ n -1)))))))
-* (if ((== 0 1) 0) ((== 1 1) 1))
-* (if ((== 0 1) 0) ((== 0 2) 0) (1 (+ 1 2 3 4)))
+* (define fac (lambda (n) (if (== n 0) 1 (* n (fac (+ n -1))))))
diff --git a/makefile b/makefile
index 966bb34..d59439e 100644
--- a/makefile
+++ b/makefile
@@ -10,7 +10,7 @@ OFILES=\
 	parser.o
 
 AS=$(CC) -c
-CFLAGS=-c  -g -O0 -Wall -std=c99
+CFLAGS=-c  -g -O2 -Wall -std=c99
 
 all: $(NAME)