diff --git a/Examples/Gateway/Gateway.ino b/Examples/Gateway/Gateway.ino
index 491f743..bd1dd17 100644
--- a/Examples/Gateway/Gateway.ino
+++ b/Examples/Gateway/Gateway.ino
@@ -16,7 +16,6 @@
 //#define FREQUENCY     RF69_915MHZ
 #define ENCRYPTKEY    "sampleEncryptKey" //exactly the same 16 characters/bytes on all nodes!
 //#define IS_RFM69HW    //uncomment only for RFM69HW! Leave out if you have RFM69W!
-#define ACK_TIME      30 // max # of ms to wait for an ack
 #define SERIAL_BAUD   115200
 
 #ifdef __AVR_ATmega1284P__
@@ -170,4 +169,4 @@ void Blink(byte PIN, int DELAY_MS)
   digitalWrite(PIN,HIGH);
   delay(DELAY_MS);
   digitalWrite(PIN,LOW);
-}
\ No newline at end of file
+}