diff --git a/README.debrand b/README.debrand
new file mode 100644
index 0000000..01c46d2
--- /dev/null
+++ b/README.debrand
@@ -0,0 +1,2 @@
+Warning: This package was configured for automatic debranding, but the changes
+failed to apply.
diff --git a/SPECS/thunderbird.spec b/SPECS/thunderbird.spec
index 5c8fac1..6822e6c 100644
--- a/SPECS/thunderbird.spec
+++ b/SPECS/thunderbird.spec
@@ -1325,6 +1325,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Tue Nov 02 2021 CentOS Sources <bugs@centos.org> - 78.13.0-2.el9.centos
+- Apply debranding changes
+
 * Thu Aug 19 2021 Carlos O'Donell <codonell@redhat.com> - 78.13.0-2
 - Rebuilt for libffi 3.4.2 SONAME transition.
   Related: rhbz#1891914