add static modifier for rb_hash_select func

1 files changed, 1 insertions, 1 deletions

diff --git a/hash.c b/hash.c
index a8077f9955..61b9c9a3cd 100644
--- a/hash.c
+++ b/hash.c
@@ -2819,7 +2819,7 @@ select_i(VALUE key, VALUE value, VALUE result)
  *  Hash#filter is an alias for Hash#select.
  */
 
-VALUE
+static VALUE
 rb_hash_select(VALUE hash)
 {
     VALUE result;