diff --git a/client.c b/client.c
index 7c3b28b..589b73e 100644
--- a/client.c
+++ b/client.c
@@ -466,7 +466,7 @@ zoom(Arg *arg)
 {
 	Client *c;
 
-	if(!sel)
+	if(!sel || arrange != dotile)
 		return;
 
 	if(sel == getnext(clients) && sel->next)  {
diff --git a/config.mk b/config.mk
index 4657aff..164fe73 100644
--- a/config.mk
+++ b/config.mk
@@ -15,7 +15,7 @@ INCS = -I/usr/lib -I${X11INC}
 LIBS = -L/usr/lib -lc -L${X11LIB} -lX11
 
 # flags
-CFLAGS = -O3 ${INCS} -DVERSION=\"${VERSION}\"
+CFLAGS = -Os ${INCS} -DVERSION=\"${VERSION}\"
 LDFLAGS = ${LIBS}
 #CFLAGS = -g -Wall -O2 ${INCS} -DVERSION=\"${VERSION}\"
 #LDFLAGS = -g ${LIBS}