diff --git a/Makefile b/Makefile
index fb3afe2..eb9386c 100644
--- a/Makefile
+++ b/Makefile
@@ -28,7 +28,7 @@ PROGRAM_SOURCE=\
 
 OBJECTS=$(subst .cc,.o,$(SOURCE))
 TOP_DIR:=$(PWD)
-CPPFLAGS=-Wall -g -I$(TOP_DIR)
+CPPFLAGS=-Wall -g -I$(TOP_DIR) -O8
 #CPPFLAGS=-Wall -std=c++0x -g -I$(TOP_DIR)
 LIBS=-lstdc++ -lboost_program_options -lexpat