diff --git a/ChangeLog b/ChangeLog
index 6345cbf8c2..019e73d206 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun May 12 17:13:32 2013  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* configure.in: removes AC_CHECK_FUNCS(setitimer) because it's
+	  unsed.
+
 Sun May 12 17:08:16 2013  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* configure.in: removes AC_CHECK_FUNCS(pause) because it's unused.
diff --git a/configure.in b/configure.in
index 5c78e10f1c..8c8daa8703 100644
--- a/configure.in
+++ b/configure.in
@@ -972,10 +972,6 @@ main()
 		ac_cv_func_isinf=yes
 		ac_cv_func_isnan=yes
 		],
-[bow], [	ac_cv_func_setitimer=no
-		],
-[superux*], [	ac_cv_func_setitimer=no
-		],
 [nacl], [
   LIBS="-lm $LIBS"
   if test "${nacl_cv_build_variant}" = "newlib"; then
@@ -1789,7 +1785,6 @@ AC_CHECK_FUNCS(setenv)
 AC_CHECK_FUNCS(seteuid)
 AC_CHECK_FUNCS(setgid)
 AC_CHECK_FUNCS(setgroups)
-AC_CHECK_FUNCS(setitimer)
 AC_CHECK_FUNCS(setpgid)
 AC_CHECK_FUNCS(setpgrp)
 AC_CHECK_FUNCS(setregid)