diff --git a/luasrc/model/cbi/easymesh.lua b/luasrc/model/cbi/easymesh.lua
index 62a90ab..0411bf0 100755
--- a/luasrc/model/cbi/easymesh.lua
+++ b/luasrc/model/cbi/easymesh.lua
@@ -179,7 +179,7 @@ o.default = "192.168.8.1"
 o.datatype = "ip4addr"
 o:depends("ap_mode", 1)
 
-so = s:option(Value, "netmask", translate("IPv4 netmask"))
+o = s:option(Value, "netmask", translate("IPv4 netmask"))
 o.default = "255.255.255.0"
 o.datatype = "ip4addr"
 o:depends("ap_mode", 1)