diff --git a/ChangeLog b/ChangeLog
index 6a5847e45d..46aaa622a8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Jan  6 00:17:18 2001  WATANABE Hirofumi  <eban@ruby-lang.org>
+
+	* pack.c (pack_pack): avoid infinite loop(pack 'm2').
+
 Sat Dec 30 03:14:22 2000  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* eval.c (rb_iterate): NODE_CFUNC does not protect its data
diff --git a/pack.c b/pack.c
index a6e4b08a1b..975081cca9 100644
--- a/pack.c
+++ b/pack.c
@@ -826,7 +826,7 @@ pack_pack(ary, fmt)
 	  case 'm':
 	    ptr = rb_str2cstr(NEXTFROM, &plen);
 
-	    if (len <= 1)
+	    if (len <= 2)
 		len = 45;
 	    else
 		len = len / 3 * 3;