Index: src/settings_gui.cpp
===================================================================
--- src/settings_gui.cpp	(revision 24112)
+++ src/settings_gui.cpp	(working copy)
@@ -909,7 +909,10 @@
 
 /** Widget definition for the game difficulty settings window */
 static const NWidgetPart _nested_game_difficulty_widgets[] = {
-	NWidget(WWT_CAPTION, COLOUR_MAUVE), SetDataTip(STR_DIFFICULTY_LEVEL_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
+	NWidget(NWID_HORIZONTAL),
+		NWidget(WWT_CLOSEBOX, COLOUR_MAUVE),
+		NWidget(WWT_CAPTION, COLOUR_MAUVE), SetDataTip(STR_DIFFICULTY_LEVEL_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
+	EndContainer(),
 	NWidget(WWT_PANEL, COLOUR_MAUVE),
 		NWidget(NWID_VERTICAL), SetPIP(2, 0, 2),
 			NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(10, 0, 10),