diff --git a/ChangeLog b/ChangeLog
index 31f7af99c5..30aecb9757 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Jun 30 02:53:26 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* thread.c (rb_threadptr_execute_interrupts_common): remove
+	  meaningless native_thread_yield(). It never close a race.
+
 Thu Jun 30 02:41:47 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* thread.c (rb_thread_schedule_limits): minor optimization.
diff --git a/thread.c b/thread.c
index 0e10768129..13e3e6ecba 100644
--- a/thread.c
+++ b/thread.c
@@ -1263,10 +1263,6 @@ rb_threadptr_execute_interrupts_common(rb_thread_t *th)
 {
     rb_atomic_t interrupt;
 
-    if (GET_VM()->main_thread == th) {
-	while (rb_signal_buff_size() && !th->exec_signal) native_thread_yield();
-    }
-
     if (th->raised_flag) return;
 
     while ((interrupt = ATOMIC_EXCHANGE(th->interrupt_flag, 0)) != 0) {