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-rw-r--r--internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index eb835f30d69..f106f4cfa5c 100644
--- a/internal.h
+++ b/internal.h
@@ -671,6 +671,7 @@ void rb_gc_resurrect(VALUE ptr);
/* hash.c */
struct st_table *rb_hash_tbl_raw(VALUE hash);
VALUE rb_hash_has_key(VALUE hash, VALUE key);
+VALUE rb_hash_set_default_proc(VALUE hash, VALUE proc);
#define RHASH_TBL_RAW(h) rb_hash_tbl_raw(h)
VALUE rb_hash_keys(VALUE hash);