diff --git a/Makefile b/Makefile
index ec3a227..4925ffa 100644
--- a/Makefile
+++ b/Makefile
@@ -25,9 +25,9 @@ INCLUDES	:=	include source source/fatfs source/nand
 #---------------------------------------------------------------------------------
 # options for code generation
 #---------------------------------------------------------------------------------
-ARCH	:=	-mthumb -mthumb-interwork
+ARCH	:=	-mthumb -mthumb-interwork -flto
 
-CFLAGS	:=	-g -Wall -O2\
+CFLAGS	:=	-g -Wall -O2 -flto\
 			-march=armv5te -mtune=arm946e-s -fomit-frame-pointer\
 			-ffast-math -std=c99\
 			$(ARCH)