diff --git a/deluge/ui/gtkui/preferences.py b/deluge/ui/gtkui/preferences.py
index 36e0b58da..94be00b5e 100644
--- a/deluge/ui/gtkui/preferences.py
+++ b/deluge/ui/gtkui/preferences.py
@@ -89,10 +89,15 @@ class Preferences(component.Component):
         # Add the default categories
         i = 0
         for category in (_("Downloads"), _("Network"), _("Bandwidth"), _("Interface"), _("Other"),
-                         _("Daemon"), _("Queue"), _("Proxy"), _("Cache"), _("Plugins")):
+                         _("Daemon"), _("Queue"), _("Proxy"), _("Cache"), _("Plugins"), "_separator_"):
             self.liststore.append([i, category])
             i += 1
 
+        def set_separator(model, iter, data=None):
+            if "_separator_" == model.get_value(iter, 1):
+                return True
+        self.treeview.set_row_separator_func(set_separator)
+
         # Setup accounts tab lisview
         self.accounts_levels_mapping = None
         self.accounts_authlevel = self.builder.get_object("accounts_authlevel")