1 files changed, 1 insertions, 1 deletions
diff --git a/process.c b/process.c
index cd53030e9e..0a97425b0a 100644
--- a/process.c
+++ b/process.c
@@ -4923,7 +4923,7 @@ static VALUE
 rb_f_sleep(int argc, VALUE *argv, VALUE _)
 {
     time_t beg = time(0);
-    VALUE scheduler = rb_current_thread_scheduler();
+    VALUE scheduler = rb_thread_scheduler_if_nonblocking(rb_thread_current());
 
     if (scheduler != Qnil) {
         rb_funcallv(scheduler, rb_intern("wait_sleep"), argc, argv);