diff --git a/src/main/java/info/istlab/ServerTester/NetworkInterfaceSelector.java b/src/main/java/info/istlab/ServerTester/NetworkInterfaceSelector.java
index fd872e7..ea9ec03 100644
--- a/src/main/java/info/istlab/ServerTester/NetworkInterfaceSelector.java
+++ b/src/main/java/info/istlab/ServerTester/NetworkInterfaceSelector.java
@@ -49,9 +49,9 @@
         for (NetworkInterface obj : interfaces) {
             String label = obj.toString()+ " / "+ NetworkInterfaceSelector.getPrimaryInetAddr(obj).getHostAddress();
             if (label.startsWith("w")){
-                label = label + " (Wi-Fi)";
+                label = new String(label + " (Wi-Fi)");
             } else if (label.startsWith("en")){
-                label = label + " (Ethernet)";
+                label = new String(label + " (Ethernet)");
             }
             JButton b = new JButton(label);
             b.addActionListener(this);