1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index 5ac75839ec..ba1d08cd59 100644
--- a/io.c
+++ b/io.c
@@ -8180,8 +8180,8 @@ Init_IO(void)
     rb_output_fs = Qnil;
     rb_define_hooked_variable("$,", &rb_output_fs, 0, rb_str_setter);
 
-    rb_global_variable(&rb_default_rs);
     rb_rs = rb_default_rs = rb_str_new2("\n");
+    rb_gc_register_mark_object(rb_default_rs);
     rb_output_rs = Qnil;
     OBJ_FREEZE(rb_default_rs);	/* avoid modifying RS_default */
     rb_define_hooked_variable("$/", &rb_rs, 0, rb_str_setter);