diff --git a/DiscoverUM3Action.py b/DiscoverUM3Action.py
index 0d8c0ad060..95105425c1 100644
--- a/DiscoverUM3Action.py
+++ b/DiscoverUM3Action.py
@@ -36,8 +36,7 @@ class DiscoverUM3Action(MachineAction):
     def startDiscovery(self):
         if not self._network_plugin:
             self._network_plugin = Application.getInstance().getOutputDeviceManager().getOutputDevicePlugin("JediWifiPrintingPlugin")
-            self._network_plugin.addPrinterSignal.connect(self._onPrinterDiscoveryChanged)
-            self._network_plugin.removePrinterSignal.connect(self._onPrinterDiscoveryChanged)
+            self._network_plugin.printerListChanged.connect(self._onPrinterDiscoveryChanged)
             self.printersChanged.emit()
 
     @pyqtSlot()
diff --git a/NetworkPrinterOutputDevicePlugin.py b/NetworkPrinterOutputDevicePlugin.py
index edcd406fab..a168f2ae43 100644
--- a/NetworkPrinterOutputDevicePlugin.py
+++ b/NetworkPrinterOutputDevicePlugin.py
@@ -30,6 +30,7 @@ class NetworkPrinterOutputDevicePlugin(OutputDevicePlugin):
 
     addPrinterSignal = Signal()
     removePrinterSignal = Signal()
+    printerListChanged = Signal()
 
     ##  Start looking for devices on network.
     def start(self):
@@ -73,6 +74,7 @@ class NetworkPrinterOutputDevicePlugin(OutputDevicePlugin):
             if printer.getKey() not in self._old_printers:  # Was the printer already connected, but a re-scan forced?
                 self._printers[printer.getKey()].connect()
                 printer.connectionStateChanged.connect(self._onPrinterConnectionStateChanged)
+        self.printerListChanged.emit()
 
     def removePrinter(self, name):
         printer = self._printers.pop(name, None)
@@ -80,6 +82,7 @@ class NetworkPrinterOutputDevicePlugin(OutputDevicePlugin):
             if printer.isConnected():
                 printer.connectionStateChanged.disconnect(self._onPrinterConnectionStateChanged)
                 printer.disconnect()
+        self.printerListChanged.emit()
 
     ##  Handler for when the connection state of one of the detected printers changes
     def _onPrinterConnectionStateChanged(self, key):