--- Makefile.orig	1998-03-11 04:46:36.000000000 -0500
+++ Makefile	2013-06-12 18:59:07.000000000 -0400
@@ -3,7 +3,7 @@
 SRC = hcode.c conv.c in.c out.c mail.c
 OBJ = $(SRC:.c=.o)
 
-CFLAGS =
+CFLAGS ?= -O
 #CFLAGS = -g 
 BINDIR = $HOME/bin