diff --git a/src/main/java/info/istlab/IoTP/SerialWindow.java b/src/main/java/info/istlab/IoTP/SerialWindow.java
index b3be63b..5400b2d 100644
--- a/src/main/java/info/istlab/IoTP/SerialWindow.java
+++ b/src/main/java/info/istlab/IoTP/SerialWindow.java
@@ -47,8 +47,6 @@
         }
         if (splist_valid.size()==1){
             SerialPort sp = splist_valid.get(0);
-            SerialWindow sw = new SerialWindow(sp);
-            hash.put(sp.getSystemPortName(), sw);
             App.serialName = sp.getSystemPortName();
         } else if (splist_valid.size()==0){
             JOptionPane.showMessageDialog(null, "No available serial ports.");