diff --git a/cura/MachineManagerModel.py b/cura/MachineManagerModel.py
index 76786efe61..7aa99e1b09 100644
--- a/cura/MachineManagerModel.py
+++ b/cura/MachineManagerModel.py
@@ -236,6 +236,13 @@ class MachineManagerModel(QObject):
 
         return ""
 
+    @pyqtProperty(str, notify = activeStackChanged)
+    def activeStackId(self):
+        if self._active_container_stack:
+            return self._active_container_stack.getId()
+
+        return ""
+
     @pyqtProperty(str, notify = activeMaterialChanged)
     def activeMaterialName(self):
         if self._active_container_stack:
diff --git a/resources/qml/SidebarSimple.qml b/resources/qml/SidebarSimple.qml
index 56c4385297..a393500fb7 100644
--- a/resources/qml/SidebarSimple.qml
+++ b/resources/qml/SidebarSimple.qml
@@ -371,7 +371,7 @@ Item
     {
         id: infillDensity
 
-        containerStackId: Cura.MachineManager.activeMachineId
+        containerStackId: Cura.MachineManager.activeStackId
         key: "infill_sparse_density"
         watchedProperties: [ "value" ]
         storeIndex: 0
@@ -406,6 +406,7 @@ Item
         watchedProperties: [ "value" ]
         storeIndex: 0
     }
+
     UM.SettingPropertyProvider
     {
         id: supportExtruderNr