diff --git a/include/proto/stream_interface.h b/include/proto/stream_interface.h
index da37f73..e790c71 100644
--- a/include/proto/stream_interface.h
+++ b/include/proto/stream_interface.h
@@ -266,6 +266,18 @@
 	si->flags |=  SI_FL_RXBLK_CHAN;
 }
 
+/* Tell a stream interface the other side is connected */
+static inline void si_rx_conn_rdy(struct stream_interface *si)
+{
+	si->flags &= ~SI_FL_RXBLK_CONN;
+}
+
+/* Tell a stream interface it must wait for the other side to connect */
+static inline void si_rx_conn_blk(struct stream_interface *si)
+{
+	si->flags |=  SI_FL_RXBLK_CONN;
+}
+
 /* The stream interface just got the input buffer it was waiting for */
 static inline void si_rx_buff_rdy(struct stream_interface *si)
 {
@@ -418,6 +430,9 @@
  */
 static inline void si_chk_rcv(struct stream_interface *si)
 {
+	if (si->flags & SI_FL_RXBLK_CONN && (si_opposite(si)->state >= SI_ST_EST))
+		si_rx_conn_rdy(si);
+
 	if (si_rx_blocked(si) || !si_rx_endp_ready(si))
 		return;
 
diff --git a/include/types/stream_interface.h b/include/types/stream_interface.h
index d9eeacb..c7334bf 100644
--- a/include/types/stream_interface.h
+++ b/include/types/stream_interface.h
@@ -80,8 +80,9 @@
 	SI_FL_RXBLK_BUFF = 0x00020000,  /* stream-int waits for a buffer allocation to complete */
 	SI_FL_RXBLK_ROOM = 0x00040000,  /* stream-int waits for more buffer room to store incoming data */
 	SI_FL_RXBLK_SHUT = 0x00080000,  /* input is now closed, nothing new will ever come */
-	SI_FL_RXBLK_ANY  = 0x000F0000,  /* any of the RXBLK flags above */
-	SI_FL_RX_WAIT_EP = 0x00100000,  /* stream-int waits for more data from the end point */
+	SI_FL_RXBLK_CONN = 0x00100000,  /* other side is not connected */
+	SI_FL_RXBLK_ANY  = 0x001F0000,  /* any of the RXBLK flags above */
+	SI_FL_RX_WAIT_EP = 0x00200000,  /* stream-int waits for more data from the end point */
 };
 
 /* A stream interface has 3 parts :