diff --git a/bacula-backup/list.cgi b/bacula-backup/list.cgi
index d349e7f6c..e46fa8cfe 100755
--- a/bacula-backup/list.cgi
+++ b/bacula-backup/list.cgi
@@ -2,6 +2,7 @@
 # Returns a list of files and directories under some directory
 
 $trust_unknown_referers = 1;
+use JSON::PP;
 require './bacula-backup-lib.pl';
 &ReadParse();