Use `size_t` for `rb_raw_obj_info`

1 files changed, 1 insertions, 1 deletions

diff --git a/gc.h b/gc.h
index 84c8eade63..a1f6e6e49d 100644
--- a/gc.h
+++ b/gc.h
@@ -112,7 +112,7 @@ int ruby_get_stack_grow_direction(volatile VALUE *addr);
 #define IS_STACK_DIR_UPPER() STACK_DIR_UPPER(1,0)
 
 const char *rb_obj_info(VALUE obj);
-const char *rb_raw_obj_info(char *buff, const int buff_size, VALUE obj);
+const char *rb_raw_obj_info(char *const buff, const size_t buff_size, VALUE obj);
 
 VALUE rb_gc_disable_no_rest(void);