diff --git a/shadowsocks-libev/files/shadowsocks.conf b/shadowsocks-libev/files/shadowsocks.conf
index 7de9c7b37..438821be4 100644
--- a/shadowsocks-libev/files/shadowsocks.conf
+++ b/shadowsocks-libev/files/shadowsocks.conf
@@ -27,7 +27,7 @@ net.ipv4.tcp_fin_timeout = 30
 # outbound port range
 net.ipv4.ip_local_port_range = 9999 65000
 # max SYN backlog
-et.ipv4.tcp_max_syn_backlog = 10240
+net.ipv4.tcp_max_syn_backlog = 10240
 # max timewait sockets held by system simultaneously
 net.ipv4.tcp_max_tw_buckets = 10000
 # turn on TCP Fast Open on both client and server side