diff --git a/package/madwifi/files/lib/wifi/madwifi.sh b/package/madwifi/files/lib/wifi/madwifi.sh
index 13631818ffb..9f464065a73 100755
--- a/package/madwifi/files/lib/wifi/madwifi.sh
+++ b/package/madwifi/files/lib/wifi/madwifi.sh
@@ -71,6 +71,7 @@ disable_atheros() (
 )
 
 enable_atheros() {
+	local device="$1"
 	config_get channel "$device" channel
 	config_get vifs "$device" vifs