diff -up ovaldi-5.9.1-src/project/linux/Makefile.optflags ovaldi-5.9.1-src/project/linux/Makefile
--- ovaldi-5.9.1-src/project/linux/Makefile.optflags	2011-05-11 10:12:51.883486771 -0400
+++ ovaldi-5.9.1-src/project/linux/Makefile	2011-05-11 10:13:41.349881277 -0400
@@ -44,7 +44,8 @@ INCDIRS = -I/usr/local/include -I/usr/in
 EXECUTABLE = $(OUTDIR)/ovaldi
 
 # General options that should be used by g++.
-CPPFLAGS = -Wall -O -DLINUX $(INCDIRS)
+OPTFLAGS = -Wall -O 
+CPPFLAGS = $(OPTFLAGS) -DLINUX $(INCDIRS)
 
 LIBDIR = -L/usr/local/lib -L/usr/lib