diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
index 3c31ddc0ed..422902265d 100644
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -852,7 +852,7 @@ struct TooltipsWindow : public Window
 		 * go below window, flip it so it is shown above the cursor */
 		pt.y = Clamp(_cursor.pos.y + _cursor.size.y + _cursor.offs.y + 5, scr_top, scr_bot);
 		if (pt.y + sm_height > scr_bot) pt.y = min(_cursor.pos.y + _cursor.offs.y - 5, scr_bot) - sm_height;
-		pt.x = Clamp(_cursor.pos.x - (sm_width >> 1), 0, _screen.width - sm_width);
+		pt.x = sm_width >= _screen.width ? 0 : Clamp(_cursor.pos.x - (sm_width >> 1), 0, _screen.width - sm_width);
 
 		return pt;
 	}