diff --git a/ChangeLog b/ChangeLog
index 33bb1489af..33837ca0c1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Dec  8 15:03:30 2003  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/syck/syck.c (syck_io_str_read): get rid of buffer overflow.
+
 Mon Dec  8 13:02:11 2003  Minero Aoki  <aamine@loveruby.net>
 
 	* lib/uri/common.rb: new method URI.regexp. [ruby-dev:22121]
diff --git a/ext/syck/syck.c b/ext/syck/syck.c
index 8f46e85ae0..ec4e7a1efd 100644
--- a/ext/syck/syck.c
+++ b/ext/syck/syck.c
@@ -88,7 +88,7 @@ syck_io_str_read( char *buf, SyckIoStr *str, long max_size, long skip )
     }
     if ( beg < str->ptr )
     {
-        len = ( str->ptr - beg ) + 1;
+        len = ( str->ptr - beg );
         S_MEMCPY( buf + skip, beg, char, len );
     }
     len += skip;