diff --git a/ChangeLog b/ChangeLog
index aaf155797a..ae3848dc73 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Jul 27 22:21:52 2006  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* time.c (time_to_s): fixed format mismatch.
+
 Thu Jul 27 18:12:12 2006  WATANABE Hirofumi  <eban@ruby-lang.org>
 
 	* time.c: need to declare time_utc_offset.
diff --git a/time.c b/time.c
index 9ff2c57631..1de44554fe 100644
--- a/time.c
+++ b/time.c
@@ -1221,7 +1221,7 @@ time_to_s(VALUE time)
 	    off = -off;
 	}
 	sprintf(buf2, "%%a %%b %%d %%H:%%M:%%S %c%02d%02d %%Y",
-		sign, off/3600, off%3600/60);
+		sign, (int)(off/3600), (int)(off%3600/60));
 	len = strftime(buf, 128, buf2, &tobj->tm);
     }
     return rb_str_new(buf, len);