diff --git a/invesalius/gui/preferences.py b/invesalius/gui/preferences.py
index 800c1af..e25d848 100644
--- a/invesalius/gui/preferences.py
+++ b/invesalius/gui/preferences.py
@@ -44,7 +44,7 @@ class Preferences(wx.Dialog):
 
         btnsizer.Realize()
         
-        sizer.AddSizer(btnsizer, 10, wx.GROW|wx.ALIGN_CENTER_VERTICAL|wx.RIGHT|wx.TOP, 5)
+        sizer.AddSizer(btnsizer, 10, wx.GROW|wx.ALIGN_CENTER_VERTICAL|wx.RIGHT|wx.TOP|wx.BOTTOM, 5)
 
         self.SetSizer(sizer)
         sizer.Fit(self)
--
libgit2 0.21.2