1 files changed, 1 insertions, 1 deletions
diff --git a/vm.c b/vm.c
index f5bb777b75..d31759724e 100644
--- a/vm.c
+++ b/vm.c
@@ -1415,7 +1415,7 @@ rb_proc_ractor_make_shareable(VALUE self)
         proc->is_isolated = TRUE;
     }
 
-    FL_SET_RAW(self, RUBY_FL_SHAREABLE);
+    rb_obj_freeze(self);
     return self;
 }