--- Makefile.orig	2009-08-04 10:55:36.000000000 +0200
+++ Makefile	2009-08-04 10:55:46.000000000 +0200
@@ -17,7 +17,7 @@
 TARGET=httping
 
 WFLAGS=-Wall -W
-OFLAGS=-O2
+OFLAGS?=-O2
 CFLAGS=$(WFLAGS) $(OFLAGS) -DVERSION=\"$(VERSION)\"
 
 PACKAGE=$(TARGET)-$(VERSION)
