diff --git a/Koha/Template/Plugin/KohaDates.pm b/Koha/Template/Plugin/KohaDates.pm
index 749f6e24f8..6a4a8824f1 100644
--- a/Koha/Template/Plugin/KohaDates.pm
+++ b/Koha/Template/Plugin/KohaDates.pm
@@ -19,6 +19,8 @@ package Koha::Template::Plugin::KohaDates;
 
 use Template::Plugin::Filter;
 use base qw( Template::Plugin::Filter );
+use warnings;
+use strict;
 
 use C4::Dates;