diff --git a/wpa_supplicant/README b/wpa_supplicant/README
index 793e21f18..506a90737 100644
--- a/wpa_supplicant/README
+++ b/wpa_supplicant/README
@@ -865,13 +865,14 @@ script:
 IFNAME=$1
 CMD=$2
 
-if [ "$CMD" == "CONNECTED" ]; then
+if [ "$CMD" = "CONNECTED" ]; then
     SSID=`wpa_cli -i$IFNAME status | grep ^ssid= | cut -f2- -d=`
     # configure network, signal DHCP client, etc.
 fi
 
-if [ "$CMD" == "DISCONNECTED" ]; then
+if [ "$CMD" = "DISCONNECTED" ]; then
     # remove network configuration, if needed
+    SSID=
 fi