--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -6,7 +6,7 @@
 											main.c main.h util.c util.h \
 											multibyte.h unicode_entities.c unicode_entities.h
 
-AM_CFLAGS = -Wall -O2 -ansi
+AM_CFLAGS = -Wall -ansi
 AM_LDFLAGS = $(STATIC)
 
 EXTRA_DIST = kilistextum.kaptn