diff --git a/invesalius/gui/task_slice.py b/invesalius/gui/task_slice.py
index 16f0831..6a36328 100644
--- a/invesalius/gui/task_slice.py
+++ b/invesalius/gui/task_slice.py
@@ -977,7 +977,9 @@ class WatershedTool(EditionTools):
         Publisher.sendMessage('Set use ww wl', value)
 
     def OnConfig(self, evt):
-        dlg.WatershedOptionsDialog().Show()
+        from data.styles import WatershedConfig
+        config = WatershedConfig()
+        dlg.WatershedOptionsDialog(config).Show()
 
     def OnExpandWatershed(self, evt):
         Publisher.sendMessage('Expand watershed to 3D AXIAL')
--
libgit2 0.21.2