1 files changed, 1 insertions, 0 deletions
diff --git a/io.c b/io.c
index cf629009a2..f0a405c4fa 100644
--- a/io.c
+++ b/io.c
@@ -3183,6 +3183,7 @@ rb_io_reopen(argc, argv, file)
     return file;
 }
 
+/* :nodoc: */
 static VALUE
 rb_io_init_copy(dest, io)
     VALUE dest, io;