diff --git a/Examples/WirelessProgramming_node/WirelessProgramming_node.ino b/Examples/WirelessProgramming_node/WirelessProgramming_node.ino
index 1165e9b..70b74dd 100644
--- a/Examples/WirelessProgramming_node/WirelessProgramming_node.ino
+++ b/Examples/WirelessProgramming_node/WirelessProgramming_node.ino
@@ -53,7 +53,7 @@ void setup(){
   pinMode(LED, OUTPUT);
   Serial.begin(SERIAL_BAUD);
   radio.initialize(FREQUENCY,MYID,NETWORKID);
-  //radio.encrypt(ENCRYPTKEY); //OPTIONAL
+  radio.encrypt(ENCRYPTKEY); //OPTIONAL
 #ifdef IS_RFM69HW
   radio.setHighPower(); //only for RFM69HW!
 #endif
@@ -137,4 +137,4 @@ void loop(){
     digitalWrite(LED, lastPeriod%2);
   }
   ////////////////////////////////////////////////////////////////////////////////////////////
-}
\ No newline at end of file
+}