1 files changed, 1 insertions, 0 deletions
diff --git a/gc.h b/gc.h
index 727e310215..09edafa027 100644
--- a/gc.h
+++ b/gc.h
@@ -88,6 +88,7 @@ RUBY_SYMBOL_EXPORT_BEGIN
 /* exports for objspace module */
 size_t rb_objspace_data_type_memsize(VALUE obj);
 void rb_objspace_reachable_objects_from(VALUE obj, void (func)(VALUE, void *), void *data);
+void rb_objspace_reachable_objects_from_root(void (func)(const char *category, VALUE, void *), void *data);
 int rb_objspace_markable_object_p(VALUE obj);
 int rb_objspace_internal_object_p(VALUE obj);