diff --git a/CommandStation-EX.ino b/CommandStation-EX.ino
index e2660e6..c0128fc 100644
--- a/CommandStation-EX.ino
+++ b/CommandStation-EX.ino
@@ -115,7 +115,7 @@ void setup()
   DIAG(F("\n===== DCC::getLocoId has returned, but the callback wont be executed until we are in loop() ======\n"));
 #endif
 
-#if ENABLE_WIFI && defined(ARDUINO_AVR_MEGA) || defined(ARDUINO_AVR_MEGA2560)
+#if ENABLE_WIFI && (defined(ARDUINO_AVR_MEGA) || defined(ARDUINO_AVR_MEGA2560))
   bool wifiUp = false;
   const __FlashStringHelper *wifiESSID = F(WIFI_SSID);
   const __FlashStringHelper *wifiPassword = F(WIFI_PASSWORD);