diff --git a/plugins/CuraEngineBackend/CuraEngineBackend.py b/plugins/CuraEngineBackend/CuraEngineBackend.py
index cc0d1b1600..e7fb946bb6 100644
--- a/plugins/CuraEngineBackend/CuraEngineBackend.py
+++ b/plugins/CuraEngineBackend/CuraEngineBackend.py
@@ -57,7 +57,8 @@ class CuraEngineBackend(Backend):
 
         #When any setting property changed, call the _onSettingChanged function.
         #This function will then see if we need to start slicing.
-        Application.getInstance().getGlobalContainerStack().propertyChanged.connect(self._onSettingChanged)
+        if Application.getInstance().getGlobalContainerStack():
+            Application.getInstance().getGlobalContainerStack().propertyChanged.connect(self._onSettingChanged)
 
         #When you update a setting and other settings get changed through inheritance, many propertyChanged signals are fired.
         #This timer will group them up, and only slice for the last setting changed signal.