1 files changed, 0 insertions, 1 deletions
diff --git a/thread.c b/thread.c
index faecec7a04..58e7651446 100644
--- a/thread.c
+++ b/thread.c
@@ -4449,7 +4449,6 @@ rb_thread_atfork(void)
     rb_thread_t *th = GET_THREAD();
     rb_thread_atfork_internal(th, terminate_atfork_i);
     th->join_list = NULL;
-    rb_mutex_cleanup_keeping_mutexes(th);
     rb_fiber_atfork(th);
 
     /* We don't want reproduce CVE-2003-0900. */