diff --git a/misc_gui.c b/misc_gui.c
--- a/misc_gui.c
+++ b/misc_gui.c
@@ -423,7 +423,7 @@ static const WindowDesc _build_trees_sce
 
 void ShowBuildTreesToolbar(void)
 {
-	AllocateWindowDesc(&_build_trees_desc);
+	AllocateWindowDescFront(&_build_trees_desc, 0);
 }
 
 void ShowBuildTreesScenToolbar(void)