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-rw-r--r--internal.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index 064f1a034a..9b8000d136 100644
--- a/internal.h
+++ b/internal.h
@@ -871,6 +871,8 @@ st_table *rb_st_copy(VALUE obj, struct st_table *orig_tbl);
/* gc.c */
size_t rb_obj_memsize_of(VALUE);
+#define RB_OBJ_GC_FLAGS_MAX 5
+size_t rb_obj_gc_flags(VALUE, ID[], size_t);
RUBY_SYMBOL_EXPORT_END