1 files changed, 1 insertions, 0 deletions
diff --git a/variable.h b/variable.h
index b00b0c5757..a95fcc563d 100644
--- a/variable.h
+++ b/variable.h
@@ -25,6 +25,7 @@ struct gen_fields_tbl {
 };
 
 int rb_ivar_generic_fields_tbl_lookup(VALUE obj, struct gen_fields_tbl **);
+void rb_copy_complex_ivars(VALUE dest, VALUE obj, shape_id_t src_shape_id, st_table *fields_table);
 
 void rb_free_rb_global_tbl(void);
 void rb_free_generic_fields_tbl_(void);