diff --git a/ChangeLog b/ChangeLog
index e859d4e1f9..cb55b83681 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jun 18 20:34:20 2012  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* time.c (init_leap_second_info): fix non-ANSI function declaration.
+
 Mon Jun 18 20:29:04 2012  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* ruby.c (rb_f_sub): use ansi style declaration.
diff --git a/time.c b/time.c
index 0d771d2715..5a50808553 100644
--- a/time.c
+++ b/time.c
@@ -1277,7 +1277,7 @@ static time_t known_leap_seconds_limit;
 static int number_of_leap_seconds_known;
 
 static void
-init_leap_second_info()
+init_leap_second_info(void)
 {
     /*
      * leap seconds are determined by IERS.