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-rw-r--r--ext/bigdecimal/bigdecimal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index aa3abb5409..ce50e780f8 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -313,7 +313,7 @@ static const rb_data_type_t BigDecimal_data_type = {
"BigDecimal",
{ 0, BigDecimal_delete, BigDecimal_memsize, },
#ifdef RUBY_TYPED_FREE_IMMEDIATELY
- 0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_FROZEN_SHAREABLE
+ 0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_FROZEN_SHAREABLE | RUBY_TYPED_WB_PROTECTED
#endif
};