diff -up mcrypt-2.6.8/src/rfc2440.c.orig mcrypt-2.6.8/src/rfc2440.c
--- mcrypt-2.6.8/src/rfc2440.c.orig	2008-11-16 14:50:01.000000000 -0500
+++ mcrypt-2.6.8/src/rfc2440.c	2008-11-25 09:26:00.000000000 -0500
@@ -409,7 +409,7 @@ length_decode(const uchar *buf, int pos,
         len += (buf[pos+1] + 192);
     }
     else if (buf[pos] == 255) {
-        len += (buf[pos+1] << 24);
+        len = (buf[pos+1] << 24);
         len += (buf[pos+2] << 16);
         len += (buf[pos+3] << 8);
         len += buf[pos+4];