1 files changed, 1 insertions, 0 deletions
diff --git a/string.c b/string.c
index 4901c38d51..ceab6ea42d 100644
--- a/string.c
+++ b/string.c
@@ -10191,6 +10191,7 @@ Init_String(void)
     rb_fs = Qnil;
     rb_define_hooked_variable("$;", &rb_fs, 0, rb_fs_setter);
     rb_define_hooked_variable("$-F", &rb_fs, 0, rb_fs_setter);
+    rb_gc_register_address(&rb_fs);
 
     rb_cSymbol = rb_define_class("Symbol", rb_cObject);
     rb_include_module(rb_cSymbol, rb_mComparable);