diff --git a/Makefile b/Makefile
index 8365de8..cf1c153 100644
--- a/Makefile
+++ b/Makefile
@@ -29,7 +29,7 @@ INCLUDES	:=	-nostdlibinc -isystem $(DEVKITPPC)/powerpc-eabi/include
 # options for code generation
 #---------------------------------------------------------------------------------
 
-CFLAGS	= -g -Os -Wall $(MACHDEP) $(INCLUDE)
+CFLAGS	= -g -O2 -Wall $(MACHDEP) $(INCLUDE)
 CXXFLAGS	=	$(CFLAGS)
 
 LDFLAGS	=	-g $(MACHDEP) -Wl,-Map,$(notdir $@).map -T$(PWD)/ipl.ld