diff --git a/include/proto/stream_interface.h b/include/proto/stream_interface.h
index 22d05be..cf45c5e 100644
--- a/include/proto/stream_interface.h
+++ b/include/proto/stream_interface.h
@@ -326,7 +326,8 @@
 static inline void si_update(struct stream_interface *si)
 {
 	stream_int_update(si);
-	si->ops->update(si);
+	if (si->ops->update)
+		si->ops->update(si);
 }
 
 /* Calls chk_rcv on the connection using the data layer */
diff --git a/src/stream_interface.c b/src/stream_interface.c
index a13311c..111071a 100644
--- a/src/stream_interface.c
+++ b/src/stream_interface.c
@@ -38,7 +38,6 @@
 #include <types/pipe.h>
 
 /* socket functions used when running a stream interface as a task */
-static void stream_int_update_embedded(struct stream_interface *si);
 static void stream_int_shutr(struct stream_interface *si);
 static void stream_int_shutw(struct stream_interface *si);
 static void stream_int_chk_rcv(struct stream_interface *si);
@@ -59,7 +58,6 @@
 
 /* stream-interface operations for embedded tasks */
 struct si_ops si_embedded_ops = {
-	.update  = stream_int_update_embedded,
 	.chk_rcv = stream_int_chk_rcv,
 	.chk_snd = stream_int_chk_snd,
 	.shutr   = stream_int_shutr,
@@ -151,91 +149,6 @@
 	channel_shutr_now(oc);
 }
 
-/* default update function for embedded tasks, to be used at the end of the i/o handler */
-static void stream_int_update_embedded(struct stream_interface *si)
-{
-	int old_flags = si->flags;
-	struct channel *ic = si_ic(si);
-	struct channel *oc = si_oc(si);
-
-	DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
-		__FUNCTION__,
-		si, si->state, ic->flags, oc->flags);
-
-	if (si->state != SI_ST_EST)
-		return;
-
-	if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW &&
-	    channel_is_empty(oc))
-		si_shutw(si);
-
-	if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc))
-		si->flags |= SI_FL_WAIT_DATA;
-
-	/* we're almost sure that we need some space if the buffer is not
-	 * empty, even if it's not full, because the applets can't fill it.
-	 */
-	if ((ic->flags & (CF_SHUTR|CF_DONT_READ)) == 0 && !channel_is_empty(ic))
-		si->flags |= SI_FL_WAIT_ROOM;
-
-	if (oc->flags & CF_WRITE_ACTIVITY) {
-		if (tick_isset(oc->wex))
-			oc->wex = tick_add_ifset(now_ms, oc->wto);
-	}
-
-	if (ic->flags & CF_READ_ACTIVITY ||
-	    (oc->flags & CF_WRITE_ACTIVITY && !(si->flags & SI_FL_INDEP_STR))) {
-		if (tick_isset(ic->rex))
-			ic->rex = tick_add_ifset(now_ms, ic->rto);
-	}
-
-	/* save flags to detect changes */
-	old_flags = si->flags;
-	if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL &&
-		   channel_may_recv(oc) &&
-		   (si_opposite(si)->flags & SI_FL_WAIT_ROOM)))
-		si_chk_rcv(si_opposite(si));
-
-	if (((ic->flags & CF_READ_PARTIAL) && !channel_is_empty(ic)) &&
-	    (ic->pipe /* always try to send spliced data */ ||
-	     (ic->buf->i == 0 && (si_opposite(si)->flags & SI_FL_WAIT_DATA)))) {
-		si_chk_snd(si_opposite(si));
-		/* check if the consumer has freed some space */
-		if (channel_may_recv(ic) && !ic->pipe)
-			si->flags &= ~SI_FL_WAIT_ROOM;
-	}
-
-	/* Note that we're trying to wake up in two conditions here :
-	 *  - special event, which needs the holder task attention
-	 *  - status indicating that the applet can go on working. This
-	 *    is rather hard because we might be blocking on output and
-	 *    don't want to wake up on input and vice-versa. The idea is
-	 *    to only rely on the changes the chk_* might have performed.
-	 */
-	if (/* check stream interface changes */
-	    ((old_flags & ~si->flags) & (SI_FL_WAIT_ROOM|SI_FL_WAIT_DATA)) ||
-
-	    /* changes on the production side */
-	    (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
-	    si->state != SI_ST_EST ||
-	    (si->flags & SI_FL_ERR) ||
-	    ((ic->flags & CF_READ_PARTIAL) &&
-	     (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) ||
-
-	    /* changes on the consumption side */
-	    (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
-	    ((oc->flags & CF_WRITE_ACTIVITY) &&
-	     ((oc->flags & CF_SHUTW) ||
-	      ((oc->flags & CF_WAKE_WRITE) &&
-	       (si_opposite(si)->state != SI_ST_EST ||
-	        (channel_is_empty(oc) && !oc->to_forward)))))) {
-		if (!(si->flags & SI_FL_DONT_WAKE))
-			task_wakeup(si_task(si), TASK_WOKEN_IO);
-	}
-	if (ic->flags & CF_READ_ACTIVITY)
-		ic->flags &= ~CF_READ_DONTWAIT;
-}
-
 /*
  * This function performs a shutdown-read on a detached stream interface in a
  * connected or init state (it does nothing for other states). It either shuts