diff --git a/ChangeLog b/ChangeLog
index 4e3d016cf1..044d5c11a6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Fri May 11 22:54:22 2012  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* thread.c (rb_threadptr_execute_interrupts_common): th->errinfo is
+	  not Fixnum, but exception object.
+	  This causes test_signal_requiring of test/ruby/test_signal.rb fail
+	  if the sub process is killed on waiting IO in lex_io_gets in require
+	  itself, not sleep.
+
 Fri May 11 14:23:11 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* parse.y (primary): begin/end block should be isolated from outside.
diff --git a/test/ruby/test_signal.rb b/test/ruby/test_signal.rb
index 0e3af06d7b..6b97ae78bd 100644
--- a/test/ruby/test_signal.rb
+++ b/test/ruby/test_signal.rb
@@ -212,7 +212,7 @@ th = Thread.new do
     STDOUT.flush
   end
 end
-Thread.pass while th.running?
+Thread.pass until th.stop? # this may stop inside lex_io_gets
 Process.kill(:INT, $$)
 th.join
 EOS
diff --git a/thread.c b/thread.c
index 27504e5e2e..5fb19547cd 100644
--- a/thread.c
+++ b/thread.c
@@ -1300,7 +1300,7 @@ rb_threadptr_execute_interrupts_common(rb_thread_t *th)
 	    thread_debug("rb_thread_execute_interrupts: %"PRIdVALUE"\n", err);
 
 	    if (err == eKillSignal || err == eTerminateSignal) {
-		th->errinfo = INT2FIX(TAG_FATAL);
+		th->errinfo = rb_exc_new2(rb_eInterrupt, "");
 		TH_JUMP_TAG(th, TAG_FATAL);
 	    }
 	    else {