diff --git a/cura/BackendPlugin.py b/cura/BackendPlugin.py
index be48aa50d2..cd859197a0 100644
--- a/cura/BackendPlugin.py
+++ b/cura/BackendPlugin.py
@@ -16,6 +16,7 @@ class BackendPlugin(AdditionalSettingDefinitionsAppender):
         self._process = None
         self._is_running = False
         self._supported_slots: List[int] = []
+        self.appender_type = "PLUGIN"
 
     def getSupportedSlots(self) -> List[int]:
         return self._supported_slots
diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index 807757d1ed..1a00d527d3 100755
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -1745,6 +1745,7 @@ class CuraApplication(QtApplication):
         pass
 
     def _addBackendPlugin(self, backend_plugin: "BackendPlugin") -> None:
+        self._container_registry.addAdditionalSettingDefinitionsAppender(backend_plugin)
         self._backend_plugins.append(backend_plugin)
 
     def getBackendPlugins(self) -> List["BackendPlugin"]: