1 files changed, 4 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index 2cf4ea7c3b..b49e748f16 100644
--- a/internal.h
+++ b/internal.h
@@ -189,6 +189,10 @@ void rb_w32_init_file(void);
 void Init_heap(void);
 void *ruby_mimmalloc(size_t size);
 
+/* hash.c */
+struct st_table *rb_hash_tbl_raw(VALUE hash);
+#define RHASH_TBL_RAW(h) rb_hash_tbl_raw(h)
+
 /* inits.c */
 void rb_call_inits(void);