1 files changed, 0 insertions, 1 deletions
diff --git a/internal/gc.h b/internal/gc.h
index b11f1775fb..c4157b51bc 100644
--- a/internal/gc.h
+++ b/internal/gc.h
@@ -242,7 +242,6 @@ size_t rb_gc_obj_slot_size(VALUE obj);
 bool rb_gc_size_allocatable_p(size_t size);
 int rb_objspace_garbage_object_p(VALUE obj);
 bool rb_gc_is_ptr_to_obj(const void *ptr);
-VALUE rb_define_finalizer_no_check(VALUE obj, VALUE block);
 
 void rb_gc_mark_and_move(VALUE *ptr);