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-rw-r--r--program/include/rcube_db.php4
1 files changed, 4 insertions, 0 deletions
diff --git a/program/include/rcube_db.php b/program/include/rcube_db.php
index 042ca15e4..f97d70ab3 100644
--- a/program/include/rcube_db.php
+++ b/program/include/rcube_db.php
@@ -576,6 +576,10 @@ class rcube_db
return intval($input);
}
+ if (is_null($input)) {
+ return 'NULL';
+ }
+
// create DB handle if not available
if (!$this->dbh) {
$this->db_connect('r');