--- libaitio/src/bpf.c	2013/06/24 14:45:37	1.1.2.4
+++ libaitio/src/bpf.c	2013/06/24 14:48:04	1.1.2.5
@@ -143,8 +143,9 @@ io_etherOpen(const char *csIface, int flags, int whdr,
 				LOGERR;
 				close(eth);
 				return -1;
-			}
-			if (!(*zcbuf = allocZCbuf(MIN(n, *buflen)))) {
+			} else
+				*buflen = MIN(n, *buflen);
+			if (!(*zcbuf = allocZCbuf(*buflen))) {
 				close(eth);
 				return -1;
 			}