diff --git a/ChangeLog b/ChangeLog
index 21eb2ed4d2..a457296930 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Feb  6 07:52:57 2009  Tanaka Akira  <akr@fsij.org>
+
+	* ext/pty/pty.c (chfunc): type fixed.
+
 Fri Feb  6 02:51:59 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* string.c (rb_str_each_codepoint): update RDoc for
diff --git a/ext/pty/pty.c b/ext/pty/pty.c
index 80a429ce8a..c44953ca13 100644
--- a/ext/pty/pty.c
+++ b/ext/pty/pty.c
@@ -155,7 +155,7 @@ struct child_info {
 };
 
 static int
-chfunc(void *data, char *errmsg, size_t errmsg_len)
+chfunc(void *data)
 {
     struct child_info *carg = data;
     int master = carg->master;