diff --git a/invesalius/data/viewer_slice.py b/invesalius/data/viewer_slice.py
index 9409914..33cc726 100755
--- a/invesalius/data/viewer_slice.py
+++ b/invesalius/data/viewer_slice.py
@@ -1440,7 +1440,7 @@ class Viewer(wx.Panel):
                 self.Layout()
         else:
             self.mip_ctrls.Hide()
-            self.GetSizer().Remove(self.mip_ctrls)
+            self.GetSizer().Detach(self.mip_ctrls)
             self.Layout()
 
     def OnSetOverwriteMask(self, pubsub_evt):
--
libgit2 0.21.2