diff --git a/controller.py b/controller.py
index 8f7b846..c2f0c89 100644
--- a/controller.py
+++ b/controller.py
@@ -32,7 +32,7 @@ def updateConnectionProjectLayersAdded(self, checked):
 
     def disconnectProjectLayersAdded(self):
         try:
-            QgsProject.instance().layersAdded.disconnect()
+            QgsProject.instance().layersAdded.disconnect(self.onLayersAdded)
         except TypeError:
             pass