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-rw-r--r--mrbgems/mruby-struct/src/struct.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mrbgems/mruby-struct/src/struct.c b/mrbgems/mruby-struct/src/struct.c
index 0c1016b4c..420052e4d 100644
--- a/mrbgems/mruby-struct/src/struct.c
+++ b/mrbgems/mruby-struct/src/struct.c
@@ -263,7 +263,7 @@ make_struct(mrb_state *mrb, mrb_value name, mrb_value members, struct RClass * k
if (!is_const_id(mrb, mrb_sym2name_len(mrb, id, NULL))) {
mrb_name_error(mrb, id, "identifier %S needs to be constant", name);
}
- if (mrb_const_defined_at(mrb, klass, id)) {
+ if (mrb_const_defined_at(mrb, mrb_obj_value(klass), id)) {
mrb_warn(mrb, "redefining constant Struct::%S", name);
/* ?rb_mod_remove_const(klass, mrb_sym2name(mrb, id)); */
}