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-rw-r--r--include/mruby/boxing_nan.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/mruby/boxing_nan.h b/include/mruby/boxing_nan.h
index 7f7478420..a28a3e56d 100644
--- a/include/mruby/boxing_nan.h
+++ b/include/mruby/boxing_nan.h
@@ -92,7 +92,7 @@ mrb_type(mrb_value o)
case MRB_NANBOX_TT_SYMBOL:
return MRB_TT_SYMBOL;
case MRB_NANBOX_TT_MISC:
- return (enum mrb_vtype)(o.u >> 8) & 0x1f;
+ return (enum mrb_vtype)((o.u >> 8) & 0x1f);
default:
/* never happen */
return MRB_TT_FLOAT;