diff --git a/invesalius/gui/preferences.py b/invesalius/gui/preferences.py
index 966864a..47acd11 100644
--- a/invesalius/gui/preferences.py
+++ b/invesalius/gui/preferences.py
@@ -31,7 +31,7 @@ class Preferences(wx.Dialog):
         if AGW:
             self.book = fnb.FlatNotebook(self, wx.ID_ANY, agwStyle=bookStyle)
         else:
-            self.book = fnb.FlatNotebook(self, wx.ID_ANY, style=bookStyle)
+            self.book = fnb.FlatNotebook(self, wx.ID_ANY, agwStyle=bookStyle)
             
         sizer.Add(self.book, 80, wx.EXPAND|wx.ALL)
         
--
libgit2 0.21.2