diff --git a/src/liblsquic/ls-qpack b/src/liblsquic/ls-qpack
index b1c04104..3edad5a9 160000
--- a/src/liblsquic/ls-qpack
+++ b/src/liblsquic/ls-qpack
@@ -1 +1 @@
-Subproject commit b1c04104b64df1be600a3a86d5144beb3d171a91
+Subproject commit 3edad5a9b75b4feec658854cf719ab12fd8ca85f
diff --git a/src/liblsquic/lsquic_full_conn_ietf.c b/src/liblsquic/lsquic_full_conn_ietf.c
index 984bd9b4..b97a7c27 100644
--- a/src/liblsquic/lsquic_full_conn_ietf.c
+++ b/src/liblsquic/lsquic_full_conn_ietf.c
@@ -1511,7 +1511,6 @@ lsquic_ietf_full_conn_server_new (struct lsquic_engine_public *enpub,
     struct lsquic_packet_out *packet_out;
     struct lsquic_packet_in *packet_in;
     struct conn_cid_elem *cce;
-    int have_outgoing_ack;
     lsquic_packno_t next_packno;
     lsquic_time_t now;
     enum packnum_space pns;
@@ -1644,7 +1643,6 @@ lsquic_ietf_full_conn_server_new (struct lsquic_engine_public *enpub,
      * been lost.  We take ownership of all packets in mc_packets_out; those
      * that are not on the list are recorded in fc_send_ctl.sc_senhist.
      */
-    have_outgoing_ack = 0;
     next_packno = ~0ULL;
     /* mini conn may drop Init packets, making gaps; don't warn about them: */
     conn->ifc_send_ctl.sc_senhist.sh_flags |= SH_GAP_OK;
@@ -1680,8 +1678,6 @@ lsquic_ietf_full_conn_server_new (struct lsquic_engine_public *enpub,
             LSQ_DEBUG("got unsent packet_out %"PRIu64" from mini (will send)",
                                                    packet_out->po_packno);
             lsquic_send_ctl_scheduled_one(&conn->ifc_send_ctl, packet_out);
-            have_outgoing_ack |= packet_out->po_frame_types &
-                                                (1 << QUIC_FRAME_ACK);
         }
     }
     conn->ifc_send_ctl.sc_senhist.sh_flags &= ~SH_GAP_OK;
diff --git a/src/lshpack b/src/lshpack
index 55c0ba47..a2128f5a 160000
--- a/src/lshpack
+++ b/src/lshpack
@@ -1 +1 @@
-Subproject commit 55c0ba472d54790555b63ab2e7241a4395d243d0
+Subproject commit a2128f5a5c6a1e04cfa39ceffbaf167ea1624979