diff -Nru corosync-2.4.3/debian/changelog corosync-2.4.3/debian/changelog
--- corosync-2.4.3/debian/changelog	2021-03-10 18:00:12.000000000 +0000
+++ corosync-2.4.3/debian/changelog	2021-09-28 18:00:07.000000000 +0000
@@ -1,3 +1,15 @@
+corosync (2.4.3-0ubuntu1.3) bionic; urgency=medium
+
+  [ Miriam España Acebal ]
+  * d/libtotem-pg5.symbols: add a postfixed missing symbol,
+    crypto_get_current_sec_header_size.
+
+  [ Jorge Niedbalski ]
+  * d/control: corosync binary depends on libqb-dev.
+    (LP: #1677684)
+
+ -- Miriam España Acebal <miriam.espana@canonical.com>  Tue, 28 Sep 2021 20:00:07 +0200
+
 corosync (2.4.3-0ubuntu1.2) bionic; urgency=medium
 
   * d/p/lp1911904-Don-t-lock-all-current-and-future-memory-if-can-t-in.patch:
diff -Nru corosync-2.4.3/debian/control corosync-2.4.3/debian/control
--- corosync-2.4.3/debian/control	2021-03-10 18:00:12.000000000 +0000
+++ corosync-2.4.3/debian/control	2021-09-28 18:00:07.000000000 +0000
@@ -39,7 +39,9 @@
  ${misc:Depends},
  lsb-base (>= 3.0-6),
  adduser,
- xsltproc
+ xsltproc,
+# corosync-blackbox: qb-blackbox dependency (LP: #1677684)
+ libqb-dev
 Breaks: pacemaker (<< 1.1.18~rc4-1ubuntu1)
 Description: cluster engine daemon and utilities
  ${DESCRIPTION}
diff -Nru corosync-2.4.3/debian/libtotem-pg5.symbols corosync-2.4.3/debian/libtotem-pg5.symbols
--- corosync-2.4.3/debian/libtotem-pg5.symbols	2021-03-10 18:00:12.000000000 +0000
+++ corosync-2.4.3/debian/libtotem-pg5.symbols	2021-09-28 18:00:07.000000000 +0000
@@ -11,6 +11,7 @@
  cipher_to_nss@Base 1.99.9
  crypto_authenticate_and_decrypt@Base 1.99.9
  crypto_encrypt_and_sign@Base 1.99.9
+ crypto_get_current_sec_header_size@Base 2.4.3-0ubuntu1.1~
  crypto_init@Base 1.99.9
  crypto_sec_header_size@Base 1.99.9
  cypher_block_len@Base 1.99.9