Use `mrb_bool` as return type of `mrb_const_defined_at`.

1 files changed, 1 insertions, 1 deletions

diff --git a/include/mruby/variable.h b/include/mruby/variable.h
index 68a4e5889..f3bf6ac8e 100644
--- a/include/mruby/variable.h
+++ b/include/mruby/variable.h
@@ -48,7 +48,7 @@ void mrb_iv_set(mrb_state *mrb, mrb_value obj, mrb_sym sym, mrb_value v);
 mrb_bool mrb_iv_defined(mrb_state*, mrb_value, mrb_sym);
 mrb_value mrb_iv_remove(mrb_state *mrb, mrb_value obj, mrb_sym sym);
 void mrb_iv_copy(mrb_state *mrb, mrb_value dst, mrb_value src);
-int mrb_const_defined_at(mrb_state *mrb, struct RClass *klass, mrb_sym id);
+mrb_bool mrb_const_defined_at(mrb_state *mrb, struct RClass *klass, mrb_sym id);
 mrb_value mrb_mod_constants(mrb_state *mrb, mrb_value mod);
 mrb_value mrb_f_global_variables(mrb_state *mrb, mrb_value self);
 mrb_value mrb_gv_get(mrb_state *mrb, mrb_sym sym);