--- libopenjpeg/Makefile.in
+++ libopenjpeg/Makefile.in
@@ -262,7 +262,7 @@
 
 # Converts cr/lf to just lf
 DOS2UNIX = dos2unix
-COMPILERFLAGS = -Wall -O3 -ffast-math -std=c99 $(am__append_1) \
+COMPILERFLAGS = -Wall $(FREETZ_CFLAGS) -ffast-math -std=c99 $(am__append_1) \
 	$(am__append_2)
 headerdir = openjpeg-$(MAJOR).$(MINOR)
 all: all-am