diff --git a/ChangeLog b/ChangeLog
index 319e9dfdc7..5876e0309c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Dec  3 02:04:21 2008  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* ext/pty/pty.c (Init_pty): fix typo.
+
 Tue Dec  2 19:22:13 2008  Tanaka Akira  <akr@fsij.org>
 
 	* lib/open3.rb (Open3.popen3): merge hash options if given. 
diff --git a/ext/pty/pty.c b/ext/pty/pty.c
index f0b8e66595..46278991a3 100644
--- a/ext/pty/pty.c
+++ b/ext/pty/pty.c
@@ -438,7 +438,7 @@ Init_pty()
     cPTY = rb_define_module("PTY");
     rb_define_module_function(cPTY,"getpty",pty_getpty,-1);
     rb_define_module_function(cPTY,"spawn",pty_getpty,-1);
-    rb_define_singleton_function(cPTY,"check",pty_check,-1);
+    rb_define_singleton_method(cPTY,"check",pty_check,-1);
 
     eChildExited = rb_define_class_under(cPTY,"ChildExited",rb_eRuntimeError);
     rb_define_method(eChildExited,"status",echild_status,0);