diff --git a/cura/PrinterOutputDevice.py b/cura/PrinterOutputDevice.py
index 3f12c2f40c..9db0a26e55 100644
--- a/cura/PrinterOutputDevice.py
+++ b/cura/PrinterOutputDevice.py
@@ -26,7 +26,7 @@ i18n_catalog = i18nCatalog("cura")
 #   For all other uses it should be used in the same way as a "regular" OutputDevice.
 @signalemitter
 class PrinterOutputDevice(QObject, OutputDevice):
-    printersChanged = pyqtSignal
+    printersChanged = pyqtSignal()
 
     def __init__(self, device_id, parent = None):
         super().__init__(device_id = device_id, parent = parent)