diff -rupN devscripts-2.17.10/scripts/git-deborig.pl devscripts-2.17.10-new/scripts/git-deborig.pl
--- devscripts-2.17.10/scripts/git-deborig.pl	2017-09-14 04:08:30.000000000 +0200
+++ devscripts-2.17.10-new/scripts/git-deborig.pl	2017-09-14 21:53:11.726873968 +0200
@@ -61,7 +61,7 @@ B<git-deborig> was written by Sean Whitt
 
 use strict;
 use warnings;
-no warnings "experimental::smartmatch";
+no if $] >= 5.018, 'warnings', 'experimental::smartmatch';
 
 use Git::Wrapper;
 use Dpkg::Changelog::Parse;