diff --git a/config.mk b/config.mk
index 820fe1b..1d023b2 100644
--- a/config.mk
+++ b/config.mk
@@ -13,7 +13,7 @@ VERSION = 0.4
 LIBS = -L${PREFIX}/lib -L/usr/lib -lc -L${X11LIB} -lX11
 
 # Linux/BSD
-CFLAGS = -Os -I. -I${PREFIX}/include -I/usr/include -I${X11INC} \
+CFLAGS = -O3 -I. -I${PREFIX}/include -I/usr/include -I${X11INC} \
 	-DVERSION=\"${VERSION}\"
 LDFLAGS = ${LIBS}
 #CFLAGS = -g -Wall -O2 -I. -I${PREFIX}/include -I/usr/include -I${X11INC} \