diff --git a/src/main/java/info/istlab/IoTP/SerialWindow.java b/src/main/java/info/istlab/IoTP/SerialWindow.java
index 8fb74a0..98f709e 100644
--- a/src/main/java/info/istlab/IoTP/SerialWindow.java
+++ b/src/main/java/info/istlab/IoTP/SerialWindow.java
@@ -70,7 +70,7 @@
         }
         if (splist_valid.size()==1){
             SerialPort sp = splist_valid.get(0);
-            SerialWindow sw = new SerialWindow(sp);
+            new SerialWindow(sp);
         } else if (splist_valid.size()==0){
             JOptionPane.showMessageDialog(Launcher.theapp, "No available serial ports.");
         } else {