diff --git a/src/peers.c b/src/peers.c
index f12b90b..d23a1fd 100644
--- a/src/peers.c
+++ b/src/peers.c
@@ -1807,6 +1807,10 @@
 	uint32_t update;
 	struct shared_table *st;
 
+	/* ignore ack during teaching process */
+	if (p->flags & PEER_F_TEACH_PROCESS)
+		return 1;
+
 	table_id = intdecode(msg_cur, msg_end);
 	if (!*msg_cur || (*msg_cur + sizeof(update) > msg_end)) {
 		/* malformed message */