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-rw-r--r--program/lib/Roundcube/rcube_imap.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/program/lib/Roundcube/rcube_imap.php b/program/lib/Roundcube/rcube_imap.php
index a323a84e4..869fa9eea 100644
--- a/program/lib/Roundcube/rcube_imap.php
+++ b/program/lib/Roundcube/rcube_imap.php
@@ -1336,7 +1336,7 @@ class rcube_imap extends rcube_storage
// THREAD=REFERENCES: sorting by sent date of root message
// THREAD=REFS: sorting by the most recent date in each thread
- if ($this->get_capability('THREAD') != 'REFS') {
+ if ($this->threading != 'REFS') {
$sortby = $this->sort_field ? $this->sort_field : 'date';
$index = $this->index_direct($this->folder, $sortby, $this->sort_order, false);