diff --git a/ui/src/lib/door.ts b/ui/src/lib/door.ts
index a0b2b86..17b244e 100644
--- a/ui/src/lib/door.ts
+++ b/ui/src/lib/door.ts
@@ -4,6 +4,8 @@ export class Door {
   private _day = -1;
   public position: Rectangle;
 
+  constructor(position: Rectangle);
+  constructor(position: Rectangle, day: number);
   constructor(position: Rectangle, day = -1) {
     this.day = day;
     this.position = position;
diff --git a/ui/src/lib/rectangle.ts b/ui/src/lib/rectangle.ts
index 455fbcf..3c7ec63 100644
--- a/ui/src/lib/rectangle.ts
+++ b/ui/src/lib/rectangle.ts
@@ -4,6 +4,8 @@ export class Rectangle {
   private readonly corner_1: Vector2D;
   private readonly corner_2: Vector2D;
 
+  constructor();
+  constructor(corner_1: Vector2D, corner_2: Vector2D);
   constructor(corner_1 = new Vector2D(), corner_2 = new Vector2D()) {
     this.corner_1 = corner_1;
     this.corner_2 = corner_2;
diff --git a/ui/src/lib/vector2d.ts b/ui/src/lib/vector2d.ts
index 2d342a8..2f7d799 100644
--- a/ui/src/lib/vector2d.ts
+++ b/ui/src/lib/vector2d.ts
@@ -2,6 +2,8 @@ export class Vector2D {
   public readonly x: number;
   public readonly y: number;
 
+  constructor();
+  constructor(x: number, y: number);
   constructor(x = 0, y = 0) {
     this.x = x;
     this.y = y;