diff --git a/src/bindings/vec2.cc b/src/bindings/vec2.cc
index 712da86..cfcf433 100644
--- a/src/bindings/vec2.cc
+++ b/src/bindings/vec2.cc
@@ -8,9 +8,9 @@ struct Vec2Wrapper : public Wrapper {
 
 void Vec2_free(mrb_state *mrb, void *ptr) {
   UNUSED(mrb);
-  uint64_t id = ((Wrapper *)ptr)->id;
+  uint64_t id = ((Vec2Wrapper *)ptr)->id;
   app::element_pool.release(id);
-  delete (Wrapper *)ptr;
+  delete (Vec2Wrapper *)ptr;
 }
 
 const struct mrb_data_type Vec2_type = {"Vec2", Vec2_free};