1 files changed, 1 insertions, 0 deletions
diff --git a/thread.c b/thread.c
index 92f5104dba..13630b6b02 100644
--- a/thread.c
+++ b/thread.c
@@ -2124,6 +2124,7 @@ rb_thread_atfork(void)
     st_clear(vm->living_threads);
     st_insert(vm->living_threads, thval, (st_data_t) th->thread_id);
     vm->sleeper = 0;
+    rb_reset_random_seed();
 }
 
 static int