diff --git a/plugins/BlackBeltPlugin/CuraEngineBackendPatches.py b/plugins/BlackBeltPlugin/CuraEngineBackendPatches.py
index 47e1e0859c..f67761166e 100644
--- a/plugins/BlackBeltPlugin/CuraEngineBackendPatches.py
+++ b/plugins/BlackBeltPlugin/CuraEngineBackendPatches.py
@@ -12,12 +12,12 @@ class CuraEngineBackendPatches():
     def __init__(self, backend):
         self._backend = backend
 
-        Application.getInstance().pluginsLoaded.connect(self._onPluginsLoaded)
-
-    def _onPluginsLoaded(self):
-        self._backend._change_timer.timeout.disconnect(self._backend.slice)
+        try:
+            self._backend._change_timer.timeout.disconnect(self._backend.slice)
+            self._backend._change_timer.timeout.connect(self.slice)
+        except:
+            pass
         self._backend.slice = self.slice
-        self._backend._change_timer.timeout.connect(self.slice)
 
         self._backend._startProcessSlicedLayersJob = self._startProcessSlicedLayersJob