diff --git a/src/main/haxework/gui/core/Box.hx b/src/main/haxework/gui/core/Box.hx
index 2578142..516f090 100644
--- a/src/main/haxework/gui/core/Box.hx
+++ b/src/main/haxework/gui/core/Box.hx
@@ -9,13 +9,12 @@ abstract Box(Array<Float>) {
     public var horizontal(get, never):Float;
     public var empty(get, never):Bool;
 
-    inline public function new(value:Array<Float>) {
-        this = switch(value) {
-            case []: [0, 0, 0, 0];
+    inline public function new(value:Array<Float> = null) {
+        this = switch value {
             case [a]: [a, a, a, a];
             case [a, b]: [a, a, b, b];
-            case [a, b, c, d]: [a, b, c, b];
-            case x: x;
+            case [a, b, c, d]: [a, b, c, d];
+            case _: [0, 0, 0, 0];
         }
     }