diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 288c8e660377..db59b259297f 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -2941,6 +2941,7 @@ static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data)
 		break;
 
 	case L2CAP_MODE_STREAMING:
+		l2cap_txwin_setup(chan);
 		rfc.mode            = L2CAP_MODE_STREAMING;
 		rfc.txwin_size      = 0;
 		rfc.max_transmit    = 0;