diff --git a/src/gui/control/tree_list.hpp b/src/gui/control/tree_list.hpp
index e47a5476..3562420d 100644
--- a/src/gui/control/tree_list.hpp
+++ b/src/gui/control/tree_list.hpp
@@ -4,8 +4,8 @@
 //| License:      GNU General Public License 2 or later (see file COPYING)     |
 //+----------------------------------------------------------------------------+
 
-#ifndef HEADER_GUI_CONTROL_TREE_LIST
-#define HEADER_GUI_CONTROL_TREE_LIST
+#ifndef HEADER_GUI_CONTROL_TREE_LIST
+#define HEADER_GUI_CONTROL_TREE_LIST
 
 // ----------------------------------------------------------------------------- : Includes
 
@@ -17,7 +17,7 @@
 /// A combination of a TreeCtrl and a ListCtrl. A tree with multiple columns.
 class TreeList : public wxPanel {
   public:
-	TreeList(Window* parent, int id, long style = wxSUNKEN_BORDER);
+	TreeList(Window* parent, int id, long style = wxBORDER_THEME);
 	
 	/// Expand/collapse an item
 	void expand(size_t item, bool expand = true);