diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py
index cd8ca09447..2185bbce9d 100755
--- a/cura/Settings/MachineManager.py
+++ b/cura/Settings/MachineManager.py
@@ -299,6 +299,7 @@ class MachineManager(QObject):
         self.activeMaterialChanged.emit()
 
         self.rootMaterialChanged.emit()
+        self.numberExtrudersEnabledChanged.emit()
 
     def _onContainersChanged(self, container: ContainerInterface) -> None:
         self._instance_container_timer.start()