1 files changed, 1 insertions, 0 deletions
diff --git a/random.c b/random.c
index d5a2dd81ba..9405ff1917 100644
--- a/random.c
+++ b/random.c
@@ -1293,6 +1293,7 @@ rb_f_rand(int argc, VALUE *argv, VALUE obj)
 static VALUE
 random_s_rand(int argc, VALUE *argv, VALUE obj)
 {
+    rand_start(&default_rand);
     return random_rand(argc, argv, rb_Random_DEFAULT);
 }