explicitly use POSIX

diff --git a/IkiWiki/Plugin/calendar.pm b/IkiWiki/Plugin/calendar.pm
index 30e2f26a301d3d24bf71ba0a9d8bece05588ea3c..536dbc075e1ce03473d41d96103d0266b384c170 100644 (file)
--- a/IkiWiki/Plugin/calendar.pm
+++ b/IkiWiki/Plugin/calendar.pm
@@ -22,6 +22,7 @@ use warnings;
 use strict;
 use IkiWiki 2.00;
 use Time::Local;
+use POSIX;
 
 my %cache;
 my %linkcache;