diff --git a/arduino-core/src/cc/arduino/packages/discoverers/serial/SerialBoardsLister.java b/arduino-core/src/cc/arduino/packages/discoverers/serial/SerialBoardsLister.java
index 6b5873892..d055a921a 100644
--- a/arduino-core/src/cc/arduino/packages/discoverers/serial/SerialBoardsLister.java
+++ b/arduino-core/src/cc/arduino/packages/discoverers/serial/SerialBoardsLister.java
@@ -157,7 +157,7 @@ public class SerialBoardsLister extends TimerTask {
           boardPort.setBoardName(boardName);
         }
       } else {
-        if (parts[1] != "0000") {
+        if (!parts[1].equals("0000")) {
           boardPort.setVIDPID(parts[1], parts[2]);
           // ask Cloud API to match the board with known VID/PID pair
           platform.getBoardWithMatchingVidPidFromCloud(parts[1], parts[2]);