--- lib/Makefile.orig	2009-03-09 09:14:29.000000000 +0100
+++ lib/Makefile	2009-03-09 09:14:35.000000000 +0100
@@ -1,7 +1,7 @@
 OCAMLMAKEFILE = ../OCamlMakefile
 
 SOURCES := pcre.mli pcre.ml pcre_stubs.c
-CFLAGS := -O2 $(shell pcre-config --cflags)
+CFLAGS += $(shell pcre-config --cflags)
 PCRE_FLAGS := $(shell pcre-config --libs)
 OCAMLLDFLAGS := -cclib "$(PCRE_FLAGS)"
 OCAMLMKLIB_FLAGS := $(PCRE_FLAGS)