diff --git a/lib/index.d.ts b/lib/index.d.ts
index 177310c..17c1ae5 100644
--- a/lib/index.d.ts
+++ b/lib/index.d.ts
@@ -604,6 +604,20 @@ interface NumericalEntity {pos: Coordinates, w: number, h: number}
 
 interface NumericalEntityWithHitbox extends NumericalEntity {hitBox: NumericalEntity}
 
+export namespace deadInTracks {
+  /**
+   * This functions checks whether ent walks against a non-walkable object and whether it should move in the x and y position and how much.
+   * The difference with wallslide is that deadInTracks stops the entity entirely when it touches a non-walkable surface.
+   * wallslide will move the entity in x or y if possible.
+   * @param ent The entity that is moving.
+   * @param map The TileMap the entity moves on.
+   * @param x The maximal movement on the x. default is 0
+   * @param y The maximal movement on the y. default is 0
+   * @returns Coordinates of how much the entity walks in x and y.
+   */
+  export function deadInTracks(ent: NumericalEntity | NumericalEntityWithHitbox, map: TileMap, x?: number, y?: number): Coordinates;
+}
+
 export namespace wallslide {
   /**
    * This functions checks whether ent walks against a non-walkable object and whether it should move in the x and y position and how much.