--- x/net/ipv4/tcp.c.~1~	2003-04-05 06:02:23.000000000 +0200
+++ x/net/ipv4/tcp.c	2003-04-05 06:03:03.000000000 +0200
@@ -1318,7 +1318,7 @@ void cleanup_rbuf(struct sock *sk, int c
 		__u32 rcv_window_now = tcp_receive_window(tp);
 
 		/* Optimize, __tcp_select_window() is not cheap. */
-		if (2*rcv_window_now <= tp->window_clamp) {
+		if (2*rcv_window_now < tp->window_clamp) {
 			__u32 new_window = __tcp_select_window(sk);
 
 			/* Send ACK now, if this read freed lots of space
@@ -1326,7 +1326,7 @@ void cleanup_rbuf(struct sock *sk, int c
 			 * We can advertise it now, if it is not less than current one.
 			 * "Lots" means "at least twice" here.
 			 */
-			if(new_window && new_window >= 2*rcv_window_now)
+			if(new_window && new_window > 2*rcv_window_now)
 				time_to_ack = 1;
 		}
 	}