--- lib/Makefile.orig	Tue Sep 17 11:26:38 2013
+++ lib/Makefile	Tue Sep 17 11:27:30 2013
@@ -6,7 +6,7 @@ SRCS=invert_pixbuf.c
 LIB=trayapp
 MAN=
 
-CFLAGS= -g -O0 `pkg-config --cflags gtk+-2.0`
+CFLAGS+= `pkg-config --cflags gtk+-2.0`
 LDFLAGS= `pkg-config --libs gtk+-2.0`
 
 install: