--- a/debian/changelog	Mon Jun 10 10:51:31 2019 +0200
+++ b/debian/changelog	Mon Jun 10 10:53:48 2019 +0200
@@ -4,6 +4,7 @@
   * Switch to Debian source format 3.0 (quilt).
   * Run test suite as part of autopkgtest.
   * Remove build dependency on obsolete dh-systemd.
+  * Specify priority “optional” instead of the obsolete “extra”.
 
  -- Jérémy Bobbio <jeremy.bobbio@irq7.fr>  Wed, 29 May 2019 16:06:20 +0200