1 files changed, 1 insertions, 0 deletions
diff --git a/io.c b/io.c
index 9ad7bff972..d136d88192 100644
--- a/io.c
+++ b/io.c
@@ -7583,6 +7583,7 @@ argf_memsize(const void *ptr)
 static const rb_data_type_t argf_type = {
     "ARGF",
     {argf_mark, argf_free, argf_memsize},
+    NULL, NULL, RUBY_TYPED_FREE_IMMEDIATELY
 };
 
 static inline void