diff -pruN 1.1.1+20191112-1/debian/changelog 1.1.1+20191112-1ubuntu1/debian/changelog
--- 1.1.1+20191112-1/debian/changelog	2021-01-09 13:01:31.000000000 +0000
+++ 1.1.1+20191112-1ubuntu1/debian/changelog	2021-03-02 05:37:00.000000000 +0000
@@ -1,3 +1,9 @@
+libunivalue (1.1.1+20191112-1ubuntu1) hirsute; urgency=medium
+
+  * Mark one more symbol as optional.
+
+ -- Matthias Klose <doko@ubuntu.com>  Tue, 02 Mar 2021 06:37:00 +0100
+
 libunivalue (1.1.1+20191112-1) unstable; urgency=medium
 
   [ upstream ]
diff -pruN 1.1.1+20191112-1/debian/libunivalue0.symbols 1.1.1+20191112-1ubuntu1/debian/libunivalue0.symbols
--- 1.1.1+20191112-1/debian/libunivalue0.symbols	2021-01-09 13:00:37.000000000 +0000
+++ 1.1.1+20191112-1ubuntu1/debian/libunivalue0.symbols	2021-03-02 05:36:57.000000000 +0000
@@ -5,7 +5,7 @@ libunivalue.so.0 libunivalue0 #MINVER#
  _Z10uvTypeNameN8UniValue5VTypeE@Base 1.0.2
  _Z12getJsonTokenRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERjPKcS8_@Base 1.0.3-2~
  _ZN20JSONUTF8StringFilter16append_codepointEj@Base 1.1.1
- _ZN20JSONUTF8StringFilter9push_backEh@Base 1.1.1+20191112
+ (optional)_ZN20JSONUTF8StringFilter9push_backEh@Base 1.1.1+20191112
  _ZN8UniValue10push_backVERKSt6vectorIS_SaIS_EE@Base 1.0.2
  (subst)_ZN8UniValue4readEPKc{size_t}@Base 1.0.3-2~
  _ZN8UniValue5clearEv@Base 1.0.2