diff --git a/src/world_c.js b/src/world_c.js
index 91111be..25d50af 100644
--- a/src/world_c.js
+++ b/src/world_c.js
@@ -2620,6 +2620,7 @@ export function b2World_CastRayClosest(worldId, origin, translation, filter)
     const worldContext = new WorldRayCastContext();
     worldContext.world = world;
     worldContext.fcn = b2RayCastClosestFcn;
+    worldContext.filter = filter;
     worldContext.fraction = 1.0;
     worldContext.userContext = result;