diff --git a/ChangeLog b/ChangeLog
index b22c608858..f2ef0e2216 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Jul 19 14:15:48 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* thread.c (rb_gc_mark_threads): remove deprecated function.
+
 Thu Jul 19 13:28:03 2012  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* test/net/http/test_http.rb (TestNetHTTPLocalBind#test_bind_to_local*):
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index 6cfeb158de..96ce961277 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -387,7 +387,6 @@ VALUE rb_protect(VALUE (*)(VALUE), VALUE, int*);
 void rb_set_end_proc(void (*)(VALUE), VALUE);
 void rb_mark_end_proc(void);
 void rb_exec_end_proc(void);
-DEPRECATED(void rb_gc_mark_threads(void));
 void rb_thread_schedule(void);
 void rb_thread_wait_fd(int);
 int rb_thread_fd_writable(int);
diff --git a/thread.c b/thread.c
index e88585fd87..6cd95696ef 100644
--- a/thread.c
+++ b/thread.c
@@ -1430,12 +1430,6 @@ rb_thread_execute_interrupts(VALUE thval)
     rb_threadptr_execute_interrupts_common(th);
 }
 
-void
-rb_gc_mark_threads(void)
-{
-    rb_bug("deprecated function rb_gc_mark_threads is called");
-}
-
 /*****************************************************/
 
 /*