diff --git a/ip2net/Makefile b/ip2net/Makefile
index 38628fd..02147f2 100644
--- a/ip2net/Makefile
+++ b/ip2net/Makefile
@@ -1,5 +1,5 @@
 CC ?= gcc
-CFLAGS += -s
+CFLAGS += -s -O3
 LIBS = 
 SRC_FILES = *.c