Index: src/parser/Makefile.in
--- src/parser/Makefile.in.orig
+++ src/parser/Makefile.in
@@ -475,7 +475,6 @@ libmodsec_parser_la_CPPFLAGS = \
 	-I.. \
 	-g \
 	-fPIC \
-	-O3 \
 	$(GEOIP_CFLAGS) \
 	$(GLOBAL_CPPFLAGS) \
 	$(MODSEC_NO_LOGS) \