1 files changed, 8 insertions, 3 deletions

diff --git a/process.c b/process.c
index 74301bba91..ee5b164dd7 100644
--- a/process.c
+++ b/process.c
@@ -4892,9 +4892,14 @@ rb_f_spawn(int argc, VALUE *argv, VALUE _)
 static VALUE
 rb_f_sleep(int argc, VALUE *argv, VALUE _)
 {
-    time_t beg, end;
+    VALUE scheduler = rb_current_thread_scheduler();
 
-    beg = time(0);
+    if (scheduler != Qnil) {
+        VALUE result = rb_funcallv(scheduler, rb_intern("wait_sleep"), argc, argv);
+        return RTEST(result);
+    }
+
+    time_t beg = time(0);
     if (argc == 0) {
 	rb_thread_sleep_forever();
     }
@@ -4903,7 +4908,7 @@ rb_f_sleep(int argc, VALUE *argv, VALUE _)
 	rb_thread_wait_for(rb_time_interval(argv[0]));
     }
 
-    end = time(0) - beg;
+    time_t end = time(0) - beg;
 
     return INT2FIX(end);
 }