--- comp.h.110110	Mon Jul 10 14:26:38 2000
+++ comp.h	Mon Jan 10 07:50:24 2011
@@ -208,7 +208,7 @@ EXPORT	W	CompWrite(VP buf, W len)
 			if (n < wpos) n = BUFSZ;
 			if ((n -= wpos) > len) n = len;
 			memcpy(&wbuf[wpos], buf, n);
-			(UB*)buf += n;
+			buf += n;
 			len -= n;
 			wpos = BUFPOS(wpos + n);
 		}